ccna第二学期练习答案

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ccna第二章练习答案.docx

yy1 ・ Refer to the exhibit・ Identify the devices labeled A, B, C, and D in the network physical documentation. 匚A=bridge, B=switch, C=router, D=hubK A=bridge, B=hub, C=router, D=switchC A=bridge, B=router, C=hub, D=switchc A=hub, B=bridge, C=router, D=switch2 The central hub has malfunctioned in the network. As a result, the entire network is down. Which type of physical network topology is implemented?匚busE starC ring匚mesh3. A switch has failed in the network. As a result, only one segment of the network is down. Which type of physical network topology is implemented?C busC ring匚starE extended star4. Which three features apply to LAN connections? (Choose three.)厂operate using serial in terfacesV make network connection using a hubV limited to operation over small geographic areas厂 provide part-time connectivity to remote servicesV typically operate under local administrative control厂provide lower bandwidth services compared to WANs5. What is one advantage of defining network communication by the seven layers of the OSI model? 【:It in creases the ban dwidth of a n etwork.E It makes networking easier to learn and understand・It eliminates many protocol restrictions.匚It increases the throughput of a network.c It reduces the need for testing network connectivity.6. What makes it easier for different networking vendors to design software and hardware that willin teroperate?E OSI modelc proprietary desig ns匚IP addressing schemec standard logical topologies匚standard physical topologies7. Which term describes the process of adding headers to data as it moves down OSI layers?匚division匚encoding匚separation匚segmentationE encapsulation8. What is the term used to describe the transport layer protocol data unit?匚bits c packetsE segments匚framesc data streams9. Which of the following are layers of the TCP/IP model? (Choose three.)▽ Applicati onr PhysicalV Internet0 Network Access厂Prese ntation10. Which of the following are data link layer encapsulation details? (Choose two.)0 A header and trailer are added・厂Data is con verted into packets ・V Packets are packaged into frames・厂Frames are divided into segments.厂Packets are changed into bits for Internet travel.11. Which layer of the OSI model provides network services to processes in electronic mail and file transfer programs?匚data link匚transport匚n etworkE application12. Which two features apply to WAN connections? (Choose two.)V operate using serial interfacesP make network connection using a hub厂limited to operation over small geographic areasI- typically operate under local administrative control▽provide lower bandwidth services compared to LANs13. Which of the following are ways that bandwidth is commonly measured? (Choose three.)厂GHzps▽kbpsV Mbps厂Nbps厂MHzpsV Gbps14. Refer to the following list. Choose the correct order of data encapsulation when a device sends information. segments bits packetsdata frames匚1 -3-5-4-2C 2- 1-3-5-4C 2-4-3-5-1匚4-3-1-2-5E 4-1 -3-5-2C 3-5-1-2-415. Which of the following are factors that determine throughput? (Choose two.)厂types of passwords used on servers厂type of Layer 3 protocol usedV n etwork topologywidth of the network cable0 number of users on the network16. Refer to the exhibit・ Which column shows the correct sequenee of OSI model layers?E D17. Which layer of the OSI model provides connectivity and path selection between two end systems where routing occurs?c physical layer匚data link layerE network layer匚transport layer18. Which best describes the function of the physical layer?E Defines the electrical and functional specifications for the link between end systems・匚Provides reliable transit of data across a physical link.匚Provides connectivity and path selection between two end systems・匚Concerned with physical addressing, network topology and media access.。

ccna2答案第十一章

第十一章CCNA 第二学期Exploration:路由协议和概念(2010-12-24 10:14:15)转载▼标分类：2010｜ CCNA2官方试题--路签：由it1窗体顶端ERouting Chapter 11 - CCNA Exploration: 路由协议和概念(版本 4.0)为形成邻接关系，OSPF 路由器之间的哪三项参数必须相等？（选择三项。

）区域idK-values度量值hello 间隔网络类型接口类型窗体底端2窗体顶端请参见图示。

图中RouterA 、RouterB 和 RouterC 的以太网接口上运行OSPF。

路由器 D 新加入网络。

置了如图所示的环回接口(Lo 0) 。

RouterD 加入网络后，OSPF DR/BDR将会发生什么情况？RouterB 将成为DR 而 RouterD 将成为BDR 。

RouterD 将成为BDR而RouterA仍然是DR 。

RouterD 将成为DR 而 RouterA 将成为BDR 。

在选举过程完成之前，RouterC 是 DR 。

RouterD 将成为DR 而 RouterB 仍然是BDR 。

在当前DR 或 BDR 失效之前， DR 或 BDR 不会发生变化。

窗体底端3窗体顶端请参见图示。

什么配置语句可以得到如图所示show ip protocols命令输出的结果？B(config)# int fa0/0B(config-if)# router-id 192.168.1.5B(config)# int lo0B(config-if)# ip address 192.168.1.5B(config)# router ospf 1B(config-router)# router-id 192.168.1.5B(config)# router ospf 1B(config-router)# ip address 192.168.1.5窗体底端4窗体顶端请参见图示。

CCNA第二学期路由协议和概念chapter3答案

下列哪两项正确描述了管理距离与度量的概念？（选择两项。

）管理距离是指特定路由的可信度。

路由器会首先添加具有较大管理距离的路由。

网络管理员无法更改管理距离的值。

具有到目的地的最小度量的路由即为最佳路径。

度量总是根据跳数确定。

度量会根据所采用的第 3 层协议（如 IP 或 IPX）而发生变化。

Option 1 and Option 4 are correct.请参见图示。

下列关于 R1 如何确定与 R2 之间最佳路径的陈述中，哪一项正确？R1 会将使用网络 A 的 RIP 路由加入路由表，因为 RIP 的管理距离比 EIGRP 大。

R1 会将使用网络 A 的 RIP 路由加入路由表，因为 RIP 的路径开销比 EIGRP 低。

R1 会将使用网络 B 的 EIGRP 路由加入路由表，因为 EIGRP 的管理距离比 RIP 小。

R1 会将使用网络 B 的 EIGRP 路由加入路由表，因为 EIGRP 的路径开销比 RIP 低。

R1 会将 EIGRP 路由和 RIP 路由加入路由表，并在它们之间实施负载均衡。

2 points for Option 3下列关于无类路由协议的陈述，哪两项是正确的？（选择两项。

）在路由更新中发送子网掩码信息将完整的路由表更新发送给所有邻居受 RIP 第 1 版支持允许在同一拓扑结构中同时使用 192.168.1.0/30 和192.168.1.16/28 子网减少组织中可用地址空间的大小Option 1 and Option 4 are correct.网络管理员可使用下列哪一条命令来确定路由器是否启用了负载均衡？show ip protocolsshow ip routeshow ip interface briefshow ip interface2 points for Option 2存在下列哪两个条件时，使用距离矢量路由协议会比较有效？（选择两项。

）网络需要特殊的分层式设计网络必须能快速收敛网络使用的是集中星型拓扑结构网络使用的是平面设计相距最远的路由器之间超过 15 跳Option 3 and Option 4 are correct.路由协议有何作用？用于构建和维护 ARP 表。

ccna2答案第五章共10页

第五章 RIPv1 CCNA2 Exploration: 路由协议和概念(2019-12-15 18:07:13)转载▼标签：杂谈分类： 2010｜CCNA2官方试题--路由1 窗体顶端ERouting Chapter 7 - CCNA Exploration: 路由协议和概念(版本 4.0)以下行显示在 show ip route 命令的输出中。

R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0该路由度量的值是什么？3122030120 窗体底端2 窗体顶端下列关于 RIPv1 特性的陈述中，哪两项是正确的？（选择两项。

）它是一种距离矢量路由协议。

它会在路由更新中通告路由的地址和子网掩码。

RIP 消息的数据部分封装在 TCP 数据段中。

RIP 消息的数据部分封装在 UDP 数据段中。

它每 15 秒广播一次更新。

它最多允许路由域中存在 15 台路由器。

窗体底端3 窗体顶端请参见图示。

图中所示的网络运行 RIPv1。

不久前其中添加了192.168.10.0/24 网络，该网络将只包含最终用户。

如果要防止向新网络中的最终用户设备发送 RIPv1 更新，同时允许将此新网络通告给其它路由器，应该在 Router1 上输入什么命令？Router1(config-router)# no router ripRouter1(config-router)# network 192.168.10.0Router1(config-router)# no network 192.168.10.0Router1(config-router)# passive-interface fastethernet 0/0Router1(config-router)# passive-interface serial 0/0/0窗体底端4 窗体顶端请参见图示。

CCNA第二学期

CCNA 2 - Module 1If a router cannot find a valid configuration file during the startup sequence, what will occur?The router will prompt the user for a response to enter setup mode.Refer to the exhibit. The network administrator has configured the router with the interface IP addresses shown for the directly connected networks. Pings from the router to hosts on the connected networks or pings between router interfaces are not working. What is the most likely problem?The interfaces must be enabled with the no shutdown command.Refer to the exhibit. What can be concluded from the routing table output in the exhibit? (Choose two.) The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IP address and the no shutdown command.An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded out of the Serial0/0/0 interface.Refer to the exhibit. The frame shown in the exhibit was received by the router. The router interfaces are operational. How will the router process this frame? (Choose two.)The router will change the frame type to one supported by the WAN link before forwarding the frame.The frame was received on the Fa0/0 interface of the router and will be s witched to the S0/0/0 interface.Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)VTY interfaceconsole interfaceprivileged EX EC modeWhich two statements correctly describe the components of a router? (Choose two.)ROM contains diagnostics executed on hardware modules.Flash memory does not lose its contents during a reboot.Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable to communicate with host 1. What is the cause of this problem?The subnet mask of host 2 is incorrect.Host 1 and host 2 are on different networks.The switch needs an IP address that is not configured.The router LA N interface and host 1 are on different networks.The IP address of host 1 is on a different network than is the LAN interface of the router.Which are functions of a router? (Choose three.)packet s witchingsegmentation of broadcast domainsselection of best path based on logical addressingRefer to the exhibit. A ll routers have a route in its routing table to each network that is shown in the exhibit. Default routes have not been issued on these routers. What can be concluded about how packets are forwarded in this network? (Choose two.)If RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded out interface S0/0/1.If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interface S0/0/1.The serial connection shown in the graphic needs to be configured. Which configuration commands must be made on the Sydney router to establish connectivity with the Melbourne site? (Choose three.) Sydney(config-if)# ip address 201.100.53.2 255.255.255.0Sydney(config-if)# no shutdownSydney(config-if)# clock rate 56000Refer to the exhibit. What can be concluded from the output of the running-configuration of a router? The commands that are dis played determine the current operation of the router.Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernet interface, what two pieces of header information are included? (Choose two.)destination IP address: 192.168.10.134destination MAC address: 9999.DADC.1234What is the outcome of entering these commands?R1(config)# line vty 0 4R1(config-line)# password check123R1(config-line)# loginsets the password to be used for connecting to this router via T elnetWhich of the following is the correct flow of routines for a router startup?load bootstrap, load IOS, apply configurationWhat three processes does a router execute when it receives a packet from one network that is destinedfor another network? (Choose three.)decapsulates the Layer 3 packet by stripping off the Layer 2 frame headeruses the destination IP Address in the IP header to look up the next-hop address in the routing tableencapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interfaceThe network administrator needs to connect two routers directly via their FastEthernet ports. What cable should the network administrator use?cross-overWhich two statements describe characteristics of load balancing? (Choose two.)Load balancing allows a router to forward packets over multiple paths to the same destination network.Unequal cost load balancing is supported by EIGRP.What information about the router and its startup process can be gathered from the output of the show version command? (Choose three.)the last restart methodthe configuration register settingsthe location from where the IOS loadedWhich interfaces in the exhibit could be used for a leased line WAN connection? (Choose two.)14From what location can a router load the Cisco IOS during the boot process? (Choose two.)TFTP serverFlash memoryA network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM?Router1# copy running-config startup-configWhat is the default sequence for loading the configuration file?NVRAM, TFTP, CONSOLEWhat header address information does a router change in the information it receives from an attached Ethernet interface before information is transmitted out another interface?the Layer 2 source and destination addressCCNA 2 - Module 2Which of the following are displayed by the Router# show cdp neighbors command? (Choose three.)platformholdtimelocal interfaceWhy is it advisable to enter a next-hop IP address when creating a static route whose exit interface is an Ethernet network?In a multi-access network, the router cannot determine the next-hop MAC address for the Ethernet frame without a next-hop address.The output of the Router# show interfaces serial 0/1 command displays the following: Serial0/1 is up, line protocol is down.What is the most likely cause for the line protocol being down?No clock rate has been set.A static route that points to the next hop IP will have what administrative distance and metric in the routing table?administrative distance of 1 and metric of 0Refer to the exhibit. What two commands will change the next-hop address for the 10.0.0.0/8 network from 172.16.40.2 to 192.168.1.2? (Choose two.)A(config)# no ip route 10.0.0.0 255.0.0.0 172.16.40.2A(config)# ip route 10.0.0.0 255.0.0.0 192.168.1.2Refer to the exhibit. A company network engineer is assigned to establish connectivity between the two Ethernet networks so that hosts on the 10.1.1.0/24 subnet can contact hosts on the 10.1.2.0/24 subnet. The engineer has been told to use only static routing for these company routers. Which set of commands will establish connectivity between the two Ethernet networks?R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1Refer to the exhibit. Which static route should be configured on Router1 so that hostA will be able to reach hostB on the 172.16.0.0 network?ip route 172.16.0.0 255.255.0.0 S0/0/0Which address can be used to summarize networks 172.16.0.0/24 thru 172.16.7.0/24?172.16.0.0/21Refer to the exhibit. What is the significance of the /8 in the route to the 10.0.0.0 network?It indicates the number of consecutive bits, from the left, in the destination IP address of a packet that must match 10.0.0.0 to use that route.What two devices are responsible for converting the data from the WAN service provider into a form acceptable by the router? (Choose two).a modema CSU/DSU deviceA network administrator enters the following command into Router1: ip route 192.168.0.0 255.255.255.0 S0/1/0. Router1 then receives a packet that is destined for192.168.0.22/24. After finding the recently configured static route in the routing table, what does Router1 do next to process the packet?encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interfaceWhich piece of information is available from examining the output of the command show ip interface brief?Interface IP addressWhich of the following is true regarding CDP and the graphic shown?By default, Router A will receive CDP advertisements from routers B and C.Which two statements describe functions or characteristics of CDP? (Choose two.)It starts up automatically and allows the device to detect directly connected neighbor devices that use CDP.It allows systems to learn about each other even if different network layer protocols are configured.Hosts on two separate subnets cannot communicate. The network administrator suspectsa missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)pingtracerouteshow ip routeWhat happens to a static route entry in a routing table when the outgoing interface is not available?The route is removed from the table.The routers in the diagram use the subnet assignments shown. What is the most efficient route summary that can be configured on Router3 to advertise the internal networks to the cloud?192.1.1.0/25Refer to the exhibit. How will packets destined to the 172.16.0.0 network be forwarded? Router1 will perform recursive lookup and packet will exit S0/0.A router has one static route configured to each destination network. Which two scenarios would require an administrator to alter the static routes that are configured on that router? (Choose two.)The destination network no longer exists.A topology change occurs where the existing next-hop address or exit interface is not accessible.Refer to the exhibit. Given the output in the exhibit, how would a clock rate be determined for this link?The rate configured on the DCE determines the clock rate.Refer to the exhibit. Which set of commands will configure static routes that will allow the WinterPark and the Altamonte routers to deliver packets from each LAN and direct all other traffic to the Internet?WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/1Refer to the exhibit. What two commands are required to provide connectivity betw een the 192.168.1.0 and 10.0.0.0 networks without requiring recursive lookup? (Choose two.)A(config)# ip route 10.0.0.0 255.0.0.0 s 0/1/0B(config)# ip route 192.168.1.0 255.255.255.0 s 0/0/0CCNA 2 - Module 3Which two statements correctly describe the concepts of administrative distance and metric? (Choose two.)Administrative distance refers to the trustworthiness of a particular route.Routes with the smallest metric to a destination indicate the best path.Refer to the exhibit. Which statement correctly describes how R1 will determine the best path to R2?R1 will install an EIGRP route using network B in its routing table because the administrative distance of EIGRP is lower than RIP.Which two statements are true regarding classless routing protoc ols? (Choose two.) sends subnet mask information in routing updatesallows for use of both 192.168.1.0/30 and 192.168.1.16/28 subnets in the same topologyWhich command would the network administrator issue to determine if load balancing is in effect on a router?show ip routeWhich statement is true regarding routing protocols?EIGRP uses DUAL to calculate the shortest path and can be configured to do unequal cost load balancing.Which two conditions would create a setting where the use of a distance-vector routing protocol would be efficient? (Choose two.)the network is using a hub and spoke topologythe network is using a flat designWhat is the purpose of a routing protocol?It allows a router to share information about known networks with other rou ters.Which of the following best describes the operation of distance vector routing protocols? They send their routing tables to directly connected neighbors.Which of the following is associated with link-state routing protocols?shortest-path first calculationsWhy is fast convergence desirable in networks that use dynamic routing protocols? Routers may make incorrect forwarding decisions until the network has converged.Which of the following conditions must be met in order for a network to have con verged The routers in the network are operating with consistent routing knowledge.Which two statements are true regarding metrics? (Choose two.)EIGRP uses bandwidth as a metric.OSPF uses cost based on bandwidth as a metric.Which two statements are true regarding the advantages of the use of static routes? (Choose two).increased securitythe administrator maintains control over routingThe following line of code is displayed in a routing table:R 209.165.201.0/24 [120/2] via 192.168.252.2, 00:00:16, S0/0/0What can be concluded from this output?The value, 120, is used to determine the best path when a router has more than one routing protocol configured for the same destination network.What will be the result of the following commands?ORL(config)# interface fastethernet 0/0ORL(config-if)# ip address 172.16.3.1 255.255.255.0ORL(config-if)# no shutdownA routing table entry is made to the 172.16.3.0 network with a code of "C".An engineer creates a static route by entering the Router(config)# ip route 10.0.0.0 255.255.255.0 192.168.1.2 command. What can be concluded about this route?The administrative distance of this route is 1.Refer to the exhibit. Router1 and Router2 are running EIGRP. All interfaces are operational and packets can be forwarded between all networks. What information will be found in the routing table for Router1?The administrative distance of the route to network 172.16.0.0 will be 90.The following line of code is present in the routing table:O 10.16.1.0/27 [110/129] via 192.168.1.5, 00:00:05, Serial0/0/1What does the number 129 indicate in this output?The cost for this link has a value of 129.A growing medium-sized manufacturing company recently began to have routing instability issues. The company uses static routes and has a mixture of over 30 Cisco and non-Cisco routers. The network administrator has decided to convert the network to dynamic routing. What characteristics of protocols should be considered in this selection process?OSPF can be used between the routers.Refer to the exhibit. If RIP is the routing protocol, what is the value of the metric from router A to network 192.168.5.0/24?3A router learns two paths with equal metrics to a destination network via the RIP routing protocol. How will the router handle packets to the destination network?The router will install both routes in the routing table and load balance between the two.CCNA 2 - Module 4Which event will cause a triggered update?a route is installed in the routing tableThree routers running a distance-vector routing protocol lost all power, including the battery backups. When the routers reload, what will happen?They will send updates that include only directly connected routes to their directly connected neighbors.What does the RIP holddown timer do?instructs routers to ignore updates, for a specified time or event, about possible inaccessible routesWhich two statements are true regarding the function of the RIPv1 routing updates? (Choose two).updates are broadcast at regular intervalsbroadcasts are sent to 255.255.255.255Which of the following statements are correct about RIP?will send out an update if there is a failure of a linkWhich two statements describe EIGRP? (Choose two.)EIGRP sends triggered updates whenever there is a change in topology that influences the routing information.EIGRP sends a partial routing table update, which includes just routes that have been changed.Which statement is true regarding cisco’s RIP_JITTER variable?It prevents the synchronization of routing updates by subtracting a random length of time ranging from 0% to 15% of the specified interval time from the next routing update interval.What actions will occur after RouterA loses connectivity to network 114.125.16.0? (Choose two.)RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterA.Router C will learn of the loss of connectivity to network 114.125.16.0 from RouterB.Which of the following methods does split horizon use to reduce incorrect routing information?Information learned from one source is not distributed back to that source.The graphic shows a network that is configured to use RIP routing protocol. Router2 detects that the link to Router1 has gone down. It then advertises the network for this link with a hop count metric of 16. Which routing loop prevention mechanism is in effect?route poisoningWhat is the purpose of the TTL field in the IP header?limits the time or hops that a packet can traverse through the network before it should be discardedWhich of the following can exist in a distance vector network that has not converged? (Choose three.)routing loopsinconsistent traffic forwardinginconsistent routing table entriesRefer to the exhibit. The routers in this network are running RIP. Router A has not received an update from Router B in over three minutes. How will Router A respond?The Invalid timer will mark the route as unusable if an update has not been received in 180 seconds.A network administrator is evaluating RIP versus EIGRP for a new network. The network will be sensitive to congestion and must respond quickly to topology changes. What are two good reasons to choose EIGRP instead of RIP in this case? (Choose two.)EIGRP only updates affected neighbors.EIGRP updates are partial.Refer to the exhibit. What path will packets from the 192.168.1.0/24 network travel to reach the 10.0.0.0/8 network if RIP is the active routing protocol?The path will be router A -> router D -> router E.Which three routing protocols are distance vector routing proto cols? (Choose three).RIPv1EIGRPRIPv2What is a routing loop?a condition where a packet is constantly transmitted within a series of routers without ever reaching its intended destinationWhich two conditions are most likely to cause a routing loop? (Choose two.)inconsistent routing tablesincorrectly configured static routesWhat metric does the RIP routing protocol consider to be infinity?16What does a router running RIP do first with a new route that is received from an advertisement?adjusts the metric for the new route to show the added distance for the routeRefer to the exhibit. If all routers are using RIP, how many rounds of updates will occur before all routers know all networks?3CCNA 2 - Module 5Refer to the exhibit. The network that is shown is running RIPv1. The 192.168.10.0/24 network was recently added and will only contain end users. What command or set of commands should be entered on Router1 to prevent RIPv1 updates from being sent to the end user devices on the new network while still allowing this new network to be advertised to other routers?Router1(config-router)# passive-interface fastethernet 0/0The following line was displayed in the output of the show ip route command.R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0What is the value of the routing metric?3Which of the following is considered a limitation of RIP v1?RIP v1 does not send subnet mask information in its updates.Refer to the exhibit. The Ethernet interface on Router2 goes down and the administrator notices that the route is still in the Router1 routing table. How much longer will Router1 keep the down network in its routing table before marking it as possibly down?155 secondsRefer to the exhibit. Router1 is running RIPv1. What command was entered into Router1 to configure the gateway of last resort?ip route 0.0.0.0 0.0.0.0 S0/0/1What are three characteristics of the RIPv1 routing protocol? (Choose three.)uses hop count as a metricconsiders a metric of 16 as infinitycalculates metrics using the Bellman Ford algorithmWhich of the following would be the correct command sequence to enable RIP on Router B for all connected networks?RouterB(config)# router ripRouterB(config-router)# network 198.16.4.0RouterB(config-router)# network 210.36.7.0RouterB(config-router)# network 220.17.29.0What is the default update period in seconds for the RIP routing protocol?30Refer to the exhibit. What can be concluded from the routing table output of router B? The default-information originate command has been entered on A.Refer to the exhibit. A network consists of multiple routers. What can be verified when the show ip protocols command is issued on one of the routers in the network? routing protocol configuration in use for IP on this routerRefer to the exhibit. All routers are configured with valid interface addresses in the indicated networks and are running RIPv1. The network is converged. Which routes are present in the routing tables?All routers have all /30 routes. Routers A and E also have some of the /24 routes in their routing table.Which two statements are true regarding the characteristics of RIPv1? (Choose two). It is a distance vector routing protocol.The data portion of a RIP message is encapsulated into a UDP segment.Which command or set of commands will stop the RIP routing process?RouterB(config)# no router ripRefer to the exhibit. All routers in the exhibit are running RIP v1. The network administrator issues the show ip route command on router A. What routes would ap pear in the routing table output if the network is converged? (Choose two).R 192.168.2.0/24 [120/1]R 10.10.1.0/24 [120/2]Which command will display RIP activity as it occurs on a router?debug ip ripRefer to the output from the show ip route command. What can be concluded from the output of this router command?There are two equal cost paths to network 1.0.0.0.Refer to the exhibit. Router1 and Router2 are running the RIPv1 protocol. The network administrator configures the command network 10.1.0.0 on Router1. What network will Router1 advertise to Router2?10.0.0.0/8Refer to the exhibit. Pings between the serial interfaces of the routers are successful. Hosts on each LAN can ping the Fa0/0 interface of the router to which they are directlyconnected through the switch. However, pings between hosts on the 10.1.1.0/24 and 10.1.2.0/24 networks are unsuccessful. What is a likely cause of this problem?RIP is configured incorrectly on R1.What will happen if an interface IP address is entered for the address portion of the network command in a RIPv1 configuration instead of a network address?All interfaces in the same classful network as the configured address will be included in the RIPv1 routing process.Refer to the exhibit. All routers that are shown are running the RIP routing protocol. All unknown IP traffic must be forwarded to the ISP. What router or set of routers are recommended to have both a default route and the default-information originate command issued to implement this forwarding policy?only the gateway routerCCNA 2 - Module 6What two advantages does CIDR provide to a network? (Choose two.)reduced routing table sizereduced routing update trafficRefer to the exhibit. The network administrator wants to create a subnet for the po int-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?255.255.255.252Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets?192.168.0.0/21Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)32-bit addresssubnet maskWhich of the following problems does VLSM help to alleviate?the shortage of IP addressesWhat does VLSM allow a network administrator to do?utilize multiple subnet masks in the same IP address spaceRefer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network 172.16.1.0 to Router B?24Refer to the exhibit. The network administrator wants to minimize the number of entries in Router1’s routing table. What should the administrator implement on the network?CIDRA router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of networks are summarized by this route?192.168.32.0 – 192.168.47.0/24A network administrator is tasked with dividing up a class C network among the QA, Sales, and Administration departments. The QA department is made up of 10 people, the Sales is made up of 28 people, and the Administration has 6. Which two subnets masks adequately address the QA and Sales departments? (Choose two.)255.255.255.224 for Sales255.255.255.240 for QAIn the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?84A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which bit mask should be used to provide for the number of host addresses required on Router A, while wasting the fewest addresses?/27An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses?192.1.1.224/28Which three interior routing protocols support VLSM? (Choose three.)OSPFRIP v2EIGRPRefer to the exhibit. The number of required host addresses for each subnet in a network is listed in the exhibit. This number includes the host address requirements for all router ports and hosts on that subnet. After all device and router port address assignments are determined, what will be the total number of unused host addresses available?29Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address ineach subnet. Which IP address would be usable for a host on one of the LANs in this network?192.168.2.130/25Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?192.168.4.15/29Refer to the exhibit. A network administrator needs to create two subnetworks from 10.0.0.0/8 for a router running RIPv2. The Admin subnet requires 120 hosts and the Sales subnet requires 58 hosts. The network administrator assigned 10.0.1.128/25 to the Admin subnet. The Sales subnet i s given 10.0.1.192/26. What will be the result of this addressing scheme?Because RIPv2 does not support VLSM, the subnet masks will not be allowed.The subnets overlap and will be rejected by the router.Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from the S0/0/0 interface on R1 to host B fails. The technician begins testing the network and has the following results:1. pings from R1 to the S0/0/0 interface on R2....successful2. pings from R1 to the Fa0/0 interface on R2....successful3. pings from host B to hosts on the 10.1.1.0/24 network....successful4. pings from host B to the Fa0/0 interface on R2....successful5. pings from R2 to host B....successful.The default gateway on host B is not correctly set.What is a supernet?a summarization of classful addressesCCNA 2 - Module 7Refer to the exhibit. If all routers are running RIP version 2, why is there no route for the 192.168.1.32/27 network?Rip version 2 will auto summarize routes by default.Refer to the exhibit. Which two statements are true? (Choose two.)Router1 will install a route to 192.168.0.0/20Router2 will not install a route to 192.168.16.0/20Refer to the exhibit. Which command on which router will allow Router1 to learn about the 192.168.0.0/20 network?Router2(config-router)# version 2What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.)RIP version 2 supports VLS M.。

CCNA第二学期Final超强整合版下

1、最新CCNA第二学期Final(超强整合版)下What are two functions of a router? (Choose two.)It forwards data packets toward their destination.It forwards the packet to the destination if the TTL value is 0.It changes the destination IP address of data packets before forwarding them to an exit interface.It determines the best path based on the destination MAC address.It acts as an intersection between multiple IP networks.答案：AE2、Refer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load the start-up configuration settings.What could be the cause of this problem?There is insufficient NVRAM.There is insufficient flash memory.The configuration register is not configured with the default setting.The system image not located in NVRAM.答案：C3、Which router component contains a scaled-down version of the IOS that can be used to reload a complete version of the IOS in the event that the IOS becomes damaged or corrupted?ROMFlashSDRAMNVRAM答案：A4、Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. What is the result of adding this command?This route is automatically propagated throughout the network.The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.A static route is established.The traffic for all Class C networks is forwarded to 172.16.1.2.答案：C5、Refer to the exhibit. How many routes are ultimate routes?3457答案：C6、Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?ADCABCIt will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.答案：C7、Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/24答案：AF8、Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the routerhandle this packet?It will forward the packet via the FastEthernet0/0 interface.It will forward the packet via the Serial0/0/0 interface.It will forward the packet via the Serial0/0/1 interface.It will drop the packet.答案：C9、Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.答案：C10、When presented with multiple valid routes to a destination, what criteria does a router use to determine which routes to add to the routing table?The router selects the routes with the best metric. All routes that have the same best metric areThe router first selects routes with the lowest administrative distance. The resulting routes are thenThe router selects the routes with the lowest administrative distance. All routes with the same lowestThe router installs all routes in the routing table but uses the route with the best metric most when答案：B11、A router has learned two equal cost paths to a remote network via the EIGRP and RIP protocols. Bothprotocols are using their default configurations. Which path to the remote network will be installed in therouting table?the path learned via EIGRPthe path learned via RIPthe path with the highest metric valueboth paths with load balancing答案：A12、Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.答案：AD13、Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been configured.答案：CDFRefer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge答案：AB15Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?10.1.1.110.1.1.2172.16.1.1192.168.1.1答案：D16、Refer to the exhibit. A network administrator accesses router R1 from the console port to configure a newly connected interface. What passwords will the network administrator need to enter to make the connection and the necessary configuration changes?the Cisco123 password onlythe Cisco789 password onlythe Cisco001 password onlythe Cisco001 password and the Cisco789 passwordsthe Cisco001 password and the Cisco123 passwords答案：D17、When connecting two devices, which situation would normally require the use of a crossover cable?connecting a host to a switchconnecting a switch to a routerconnecting a switch to a switchconnecting a host to a router console port答案：C18、Refer to exhibit. A company network engineer enters the following commands in the routers:R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1When the engineer enters the show ip route command on R1, the routing table does not display the static route to the 10.1.1.0 network. All R1 and R2 interfaces are correctly addressed per the graphic. What is a logical next step that the engineer could take in order to make the static route display in the routing table in R1?Enter default routes in R1 and R2.Enable the R1 and R2 serial interfaces.Configure the static route to use an exit interface instead of a next-hop address.Enter the copy run start command to force the router to recognize the configuration.答案：B19、Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)The command was run on the router.ABCD is a non- CISCO device.Layer 3 connectivity between two devices exists.ABCD supports routing capability.ABCD is connected to the Fa0/0 interface of the neighboring device.答案：AE20、Refer to the exhibit. The network administrator has run the following command on R1.R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2What is the result of running this command?Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.This route is automatically propagated throughout the entire network.Traffic for all networks is forwarded to 172.16.1.2.The command invokes a dynamic routing protocol for 192.168.2.0.答案：A21、The network administrator configures the router with the ip route 172.16.1.0 255.255.255.0 172.16.2.2 command. How will this route appear in the routing table?C 172.16.1.0 is directly connected, Serial0/0S 172.16.1.0 is directly connected, Serial0/0C 172.16.1.0 [1/0] via 172.16.2.2S 172.16.1.0 [1/0] via 172.16.2.2答案：D22、Refer to the exhibit. The command ip route 0.0.0.0 0.0.0.0 S0/0/0 is run on router R2. What are the two results of this command? (Choose two.)A static route will be updated in the routing table.The traffic from the Internet will be directed to R2.The traffic from the source network 172.16.0.0/22 will be blocked.The route will be specified as the default route for all networks not defined in the routing table.All the broadcasts will be forwarded via the S0/0/0 interface of R2.答案：AD23、Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The network administrator has run the show ip route command on R1.What could be the cause of this problem?The FastEthernet interface on R1 is disabled.Autosummarization is enabled on R1.The serial interface S0/0/0 of R1 is administratively down.No static route or routing protocol is configured.答案：D24、A company i s using static routes that are configured with an administrative distance of “1” on all routers in the network. The network administrator decides to introduce a dynamic routing protocol to reduce the manual configurations for the static routes. Which option identifies the correct procedure for the dynamic routing to take place in the network?The static routes and the dynamic routes will have the traffic alternate between them.The static routes will be automatically removed once the dynamic routing is configured.The static routes will be automatically updated with the next hop IP address once the dynamicThe static routes must be manually removed from all routers in order for the dynamic routes to be答案：D25、Refer to the exhibit. An administrator is adding a new subnet of 50 hosts to R3. Which subnet address should be used for the new subnet that provides enough addresses while wasting a minimum of addresses?192.168.1.0/24192.168.1.48 /28192.168.1.32/27192.168.1.64/26答案：D26、Refer to the exhibit. What summarization should R2 use to advertise its LAN networks to R1?172.16.0.0/24172.16.4.0/22172.16.4.0/23172.16.4.0/24答案：B27、Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.The default gateway of host A is incorrect.The Fa0/1 interfaces of the two routers are configured for different subnets.The subnet mask for the Fa0/0 interface of R1 is incorrect.答案：C28、Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?host Ahost Bhost Chost D答案：B29、A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 2000 hosts for local LANs. Which subnet mask should the administrator use to create the new subnets?255.255.224.0255.255.240.0255.255.248.0255.255.252.0答案：C30、How will a router that is configured with a classless routing protocol determine the subnet mask that should be assigned to routes that are learned from neighboring classless routers?The subnet mask that is included in the routing updates will be used.The subnet mask of the interface that receives the update will be used.The subnet mask that is specified in the network command will be used.The class of the network in the update will determine the subnet mask that is used.答案：A31、Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.)The missing information for Blank 1 is the command show ip route.The missing information for Blank 1 is the command debug ip route.The missing information for Blank 2 is the number 100.The missing information for Blank 2 is the number 120.The missing information for Blank 3 is the letter R.The missing information for Blank 3 is the letter C答案：ADF32、Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Advertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.答案：B33、Refer to the exhibit. The network is using the RIPv2 routing protocol. If network 10.0.0.0 goes down, what mechanism will prevent Router1 from advertising false routing information back to Router2?triggered updatespoison reverseholddown timerssplit horizon答案：D34、Refer to the exhibit. While trying to diagnose a routing problem in the network, the network administrator runs the debug ip rip command. What can be determined from the output of this command?The router is broadcasting RIP updates.The router will be unable to ping 192.168.1.2.The router is directly connected to network 172.16.1.0 /24.The router has two interfaces that participate in the RIP process.答案：D35、Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configured and operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any routes from R1 in the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.R2 will not accept version 1 updates from R1.答案：C36、Refer to the exhibit. When the show cdp neighbors command is issued from router C, which devices will be displayed in the output?B, DA, B, DD, SWH-2SWH-1, A, BSWH-1, SWH-2A, B, D, SWH-1, SWH-2答案：A37、Refer to the exhibit. The routers in the exhibit are running the EIGRP routing protocol. What statement is true regarding how packets will travel from the 172.16.1.0/16 network to the 192.168.200.0/24 network?The router chooses the first path that it learned and installs only that route in the routing table.The router chooses the path with the lowest administrative distance and installs only that route in the routing table.The router chooses the highest routing ID based on the advertised network IP addresses and installs only that route in the routing table.The router installs all the equal cost paths in the routing table but sends packets out only one, holding the others in reserve in case the primary route goes down.The router installs all the equal cost paths in the routing table and performs equal cost loadbalancing to send packets out multiple exit interfaces.答案：E38、Which three statements describe the operation of routing with EIGRP? (Choose three.)As new neighbors are discovered, entries are placed in a neighbor table.If the feasible successor has a higher advertised cost than the current successor route, then it becomes the primary route.If hello packets are not received within the hold time, DUAL must recalculate the topology.The reported distance is the distance to a destination as advertised by a neighbor.EIGRP maintains full knowledge of the network topology in the topology table and exchanges full routing information with neighboring routers in every update.EIGRP builds one routing table that contains routes for all configured routed protocols.答案：ACD39、Which statement correctly describes a feasible successor in EIGRP?It is a primary route that is stored in the routing table.It is a backup route that is stored in the routing table.It is a primary route that is stored in the topology table.It is a backup route that is stored in the topology table.答案：D40、Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor adjacency.What action should be taken to solve this problem?Enable the serial interfaces of both routers.Configure EIGRP to send periodic updates.Configure the same hello interval between the routers.Configure both routers with the same EIGRP process ID.答案：D41、Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sent to the neighbors.The adjacencies between the routers are yet to be established.The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2S0/0/1 interface.答案：D42、Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)All routes are stable.Each route has one feasible successor.The serial interface between the two routers is down.The administrative distance of EIGRP has been set to 50.The show ip eigrp topology command has been run on R1.答案：AE43、Refer to the exhibit. R2 is configured correctly. The network administrator has configured R1 as shown. Which two facts are true about the forwarding of route information by R1? (Choose two.)R1 will forward the route information for subnet 192.168.100.0/30.R1 will not forward route information for subnet 192.168.100.4/30.R1 will forward the route information with an administrative distance set to 50.R1 will forward the summarized route information for network 192.168.100.0/24.R1 will forward route information for subnet 10.10.10.0/30 out the serial interface.答案：AB44、Refer to the exhibit. A network administrator is trying to determine why router JAX has no OSPF routes in its routing table. All routers are configured for OSPF area 0. From the JAX router, the administrator is able to ping its connected interfaces and the Fa0/1 interface of the ORL router but no other router interfaces. What is a logical step that the network administrator should take to troubleshoot the problem?Reboot the routers.Change the OSPF process ID on all of the routers to 0.Check to see if the cable is loose between ORL and JAX.Check to see if CDP packets are passing between the routers.Use show and debug commands to determine if hellos are propagating.答案：E45、Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to configure a single area OSPF for the networks that are connected to R2?R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 1答案：A46、Refer to the exhibit. A network administrator has configured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interface will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/1答案：C47、What is the function of the OSPF LSU packet?used to confirm receipt of certain types of OSPF packetsused to establish and maintain adjacency with other OSPF routersused to request more information about any entry in the BDRused to announce new OSPF information and to reply to certain types of requests答案：D48、Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address答案：BC49、Refer to the exhibit. OSPF is used for the routing protocol and all interfaces are configured with the correct IP addresses and subnet masks. During testing, it is found that router R1 is unable to form an adjacency with R2. What is the cause of this problem?Both routers have been configured with incorrect router IDs.Both routers have been configured in different OSPF areas.Both routers have been configured with an incorrect network type.Both routers have been configured with different hello and dead intervals.答案：D50、Refer to the exhibit. The IP addresses on all interfaces on router R1 were configured before the OSPF protocol had been enabled on the router. No OSPF router ID was manually configured. Which IP address will be selected by the router as an OSPF router ID?10.10.10.1172.16.1.1172.16.2.1192.168.1.1192.168.100.1答案：AExam Viewer - ERouting Final Exam - CCNA Exploration: Routing Protocols and Concepts (Version 4.0)Below you will find the assessment items as presented on the exam as well as the scoring rules associated with the item.Use of the exam information in the Exam Viewer is subject to the terms of the Academy Connection Website Usage Agreement between you and Cisco. The purpose of the Exam Viewer is to support instruction while not compromising exam security for other Cisco Networking Academies or students.This material should not be distributed outside a proctored and controlled setting. If misuse is found,action will be taken to limit access to assessment content. Please remember to logout and close your browser window after using the Exam Viewer.1Using default settings, what is the next step in the router boot sequence after the IOS loads from flash?Perform the POST routine.Search for a backup IOS in ROM.Load the bootstrap program from ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.Scoring Rule For: correctness ofresponseThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.4 Router Boot-up Process2 A router boots and enters setup mode. What is the reason for this?The IOS image is corrupt.Cisco IOS is missing from flash memory.The configuration file is missing from NVRAM.The POST process has detected hardware failure.Scoring Rule For: correctness ofresponseThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.4 Router Boot-up Process3Which two router component and operation pair are correctly described? (Choose two.)DRAM - loads the bootstrapRAM - stores the operating systemFlash - executes diagnostics at bootupNVRAM - stores the configuration fileROM - stores the backup configuration filePOST - runs diagnostics on hardware modulesScoring RuleFor: correctness of responseOption 4 andOption 6 arecorrect.1 point for eachcorrect option.0 points if moreoptions areselected thanrequired.Max Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.2 Router CPU and Memory4Refer to exhibit. Given the topology shown in the exhibit, what three commands are needed to configure EIGRP on the Paris router? (Choose three.)Paris(config)# router eigrp 100Paris(config)# router eigrpParis(config-router)# network 192.168.6.0Paris(config-router)# network 192.168.7.0Paris(config-router)# network 192.168.8.0Paris(config-router)# network 192.168.9.0Scoring Rule For: correctness ofresponseOption 1, Option 4, and Option 5are correct.1 point for each correct option.0 points if more options areselected than required.Max Value = 3This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts•9.2.4 The network Command5Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface Fa is not functioning. Which action will most likely correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.Scoring Rule For: correctness ofresponse2 points for Option 40 points for any other optionThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.2.2 Basic Router Configuration6Which routing protocol maintains a topology table separate from the routing table?IGRPRIPv1RIPv2EIGRPScoring Rule For: correctness ofresponseThis item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts•9.1.1 EIGRP: An Enhanced Distance Vector Routing Protocol7Which statement is true about the metrics used by routing protocols?A metric is a value used by a partiA common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.Scoring Rule For: correctness ofresponse2 points for Option 10 points for any other optionMax Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 3.3.1 Purpose of a Metric8Refer to the exhibit. All interfaces are addressed and functioning correctly. The network administrator runs the tracert comma Which two facts could be responsible for the output of this command? (Choose two.)The gateway for Host A is missing or improperly configured.The gateway for Host B is missing or improperly configured.The entry for 192.168.1.0/24 is missing from the routing table of R1.The entry for 192.168.1.0/24 is missing from the routing table of R2.The entry for 192.168.2.0/24 is missing from the routing table of R1.The entry for 192.168.2.0/24 is missing from the routing table of R2.Scoring Rule For: correctness ofresponseOption 4 and Option 5 are correct.1 point for each correct option.0 points if more options are selectedthan required.Max Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 2.7.2 Troubleshooting a Missing Route9Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sThe adjacencies between the routers are yet to be established.The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.Scoring Rule For: correctness ofresponse2 points for Option 40 points for any other optionMax Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts•9.5.1 The Null0 Summary Route10Which phase of the router boot process involves running diagnostics on the hardware components from ROM?performing the POSTloading the bootstrap programlocating and loading the Cisco IOS softwarelocating and loading the startup configuration fileScoring Rule For: correctness ofresponse2 points for Option 10 points for any other optioMax Value = 2This item references content from the following areas:CCNA Exploration: Routing Protocols and Concepts• 1.1.4 Router Boot-up Process11Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. W result of adding this command?This route is automatically propagated throughout the network.The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.A static route is established.The traffic for all Class C networks is forwarded to 172.16.1.2.Scoring Rule For: correctness of。

CCNA_ESwitching _Chapter_2_答案

1请参见图示。

当主机 1 试图发送数据时会发生什么情况？来自主机 1 的帧会导致接口关闭。

会丢弃来自主机 1 的帧，且不发送日志消息。

来自主机 1 的帧会在运行配置中创建MAC 地址条目。

来自主机 1 的帧会删除地址表中的所有MAC 地址条目。

2启动配置存储在哪里？DRAMNVRAMROMstartup-config.text3下列关于执行模式口令的说法中哪两项正确？（选择两项。

）使能加密口令命令采用明文存储所配置的口令。

使能加密口令命令的安全性比使能口令高。

使能口令和使能加密口令用于保护对特权执行模式的访问。

需要采用命令service password-encryption来加密使能加密口令。

最佳做法是要求同时配置并使用使能口令和使能加密口令。

4请参见图示。

网络管理员尝试通过安全外壳连接到Switch1 但失败了。

最可能的原因是什么？配置的vty 线路不正确默认网关地址不正确安全外壳版本不兼容vty 线路被配置为只允许Telnet 连接5请参见图示。

图中显示网络中存在多少个冲突域？1246786请参见图示。

图中显示了show running-config命令的部分输出。

此交换机的使能口令是"cisco"。

从图中所示的输出可得默认情况下会加密使能口令。

所有加密口令均采用MD5 哈希算法加密。

在此配置中，已配置的所有线路模式口令都会被加密。

此行代表最安全的特权执行模式口令。

7请参见图示。

如果SW1 的MAC 地址表为空，SW1 会对从PC_A 发送到PC_C 的帧采取以下哪项操作？SW1 会丢弃该帧。

SW1 会将该帧从除端口Fa0/1 之外的所有端口泛洪出去。

SW1 会将该帧从该交换机上除端口Fa0/23 和Fa0/1 之外的所有端口泛洪出去。

SW1 会采用CDP 协议同步两台交换机的MAC 地址表，然后将帧转发到SW2 上的所有端口。

8可采用哪两种方法来使交换机不易受MAC 地址泛洪、CDP 攻击和Telnet 攻击等攻击的影响？（选择两项。

CCNA第二学期官方章节考试题之《距离矢量路由协议》(附答案)46doc

数据包在路由器的两个环回接口之间来回传递
从目的地返回的路径与出发路径不同而形成
数据包在一系列路由器间不断传输却始终无法到达其真正的目的地的情况路由从一种路由协议到另一种路由协议的分布
2
用于在发送到其它路由器的更新中将路由标记为不可达
防止定期更新消息错误地恢复已经不可用的路由
防止从收到更新的接口通告同一网络
限制数据包在被丢弃之前在网络中传输的时间或跳数
通过设置最大跳数来为每一距离矢量路由协议定义最大度量值
4以
路由环路
不一致的流量转发
除非系统收敛，否则不会转发任何流量
路由表条目不一致
路由表更新被发送到错误的目的地
6运
立即将其加入路由表中
调整新路由的度量以显示增加的路由距离
将该路由从其传入接口以外的所有其它接口通告出去
发送
8下
它会在更新从路由器接口送出时缓冲更新，以此防止路由更新同步。

它会从下一次路由更新间隔中减去随机时间段（大小为指定间隔时间的
它会使路由器跳过每一个其它计划更新时间，以此防止路由更新同步。

它会强制路由器在发送自身更新之前侦听链路上的其它更新是何时发送的，以此防止路由更新同步10
13以15水
17R
19哪
抑制计时器将等候
如果在
更新计时器将请求有关从路由器Hello。

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ERouting Chapter 1 - CCNA Exploration: 路由协议和概念 (版本 4.0) 1 口令可用于限制对 Cisco IOS 所有或部分内容的访问。请选择可以用口令保护的模式和接口。（选择三项。） VTY 接口

控制台接口特权执行模式

2 路由器从相连的以太网接口收到消息后，会更改哪项报头地址，再将消息从另一个接口发送出去？第 2 层源地址和目的地址

3 请参见图示。网络管理员已经为路由器连接到直连网络的接口配置了如图所示的 IP 地址。从路由器 ping 相连网络上的主机口之间相互 ping 都会遭到失败。此问题最可能的原因是什么？

必须使用 no shutdown 命令启用接口。

请参见图示。主机 A ping 主机 B。当 R4 收到对以太网接口的 ping 时，哪两块报头信息包括在内？（选择两项。）目的 IP 地址：192.168.10.134

目的 MAC 地址：9999.DADC.1234 5 网络管理员刚把新配置输入 Router1。要将配置更改保存到 NVRAM，应该执行哪一条命令？ Router1# copy running-config startup-config

您需要配置图中所示的串行连接，必须在 Sydney 路由器上发出以下哪条配置命令才能与 Melbourne 站点建立连接？（选 Sydney(config-if)# ip address 201.100.53.2 255.255.255.0

Sydney(config-if)# no shutdown Sydney(config-if)# clock rate 56000

7 请参见图示。从路由器的运行配置输出可得出什么结论？显示的命令决定了路由器的当前运行情况。

请参见图示。在主机 2 连接到 LAN 上的交换机后，主机 2 无法与主机 1 通信。导致此问题的原因是什么？主机 1 和主机 2 位于不同的网络中。 9 输入以下命令的作用是什么？ R1(config)# line vty 0 4 R1(config-line)# password check123 R1(config-line)# login

设置通过 Telnet 连接该路由器时使用的口令

10 以下哪一项正确描述了路由器启动时的顺序？加载 bootstrap、加载 IOS、应用配置

11 加载配置文件时的默认顺序是怎样的？ NVRAM、TFTP、CONSOLE

请参见图示。所有路由器的路由表中都有到达如图所示每个网络的路由。这些路由器上没有配置默认路由。以下关于数据包发方式的结论中，哪两项是正确的？（选择两项。）

如果 RouterA 接收到发往 192.168.3.146 的数据包，它将把该数据包从接口 S0/0/1 转发出去。

如果 RouterB 接收到发往 10.5.27.15 的数据包，它将把该数据包从接口 S0/0/1 转发出去。

13 关于负载均衡特征的描述，哪两条是正确的？（选择两项。）负载均衡可让路由器通过多条路径将数据包发送到同一的目的网络。 EIGRP 支持不等价负载均衡。 14

请参见图示。从图中的路由表输出可得出什么结论？（选择两项。）此路由器的 FastEthernet0/0 接口和 Serial0/0/0 接口配置了 IP 地址和 no shutdown 命令。

路由器收到的目的地址为 198.18.9.1 的 IP 数据包后，将从 Serial0/0/0 接口转发出去。

15 如果路由器在启动时无法找到有效的配置文件，将发生什么情况？路由器将提示用户进行响应，以进入设置模式。

图中的哪些接口可用于租用线路 WAN 连接？（选择两项。） 1 4

17 下列哪些是路由器的功能？（选择三项。）分组交换

广播域分段根据逻辑编址选择最佳路径

18 哪两项说法正确描述了路由器的组件？（选择两项。） ROM 含有硬件模块所执行的诊断程序。

重新启动时闪存中的内容不会丢失。

19 在启动过程中，路由器可以从哪些位置加载 Cisco IOS？（选择两项。） TFTP 服务器

闪存

20 网络管理员需要通过路由器的 FastEthernet 端口直接连接两台路由器。应使用哪种电缆？交叉电缆

21 当路由器收到从一个网络发往另一个网络的数据包时，它会执行哪三个过程？（选择三项。）通过解开第 2 层帧报头来解封第 3 层数据包

通过 IP 报头中的目的 IP 地址在路由表中查找下一跳地址将第 3 层数据包封装成新的第 2 层帧，并将该帧从送出接口转发出去参加考试 - ERouting Chapter 2 - CCNA Exploration: 路由协议和概念 (版本 4.0) 1 当外发接口不可用时，路由表中的静态路由条目有何变化？该路由将从路由表中删除。

2 哪两种设备负责将来自 WAN 服务提供商的数据转换为路由器可以接受的形式？（选择两项。）调制解调器

CSU/DSU 设备

请参见图示。要使 WinterPark 和 Altamonte 路由器能够传送来自每个 LAN 的数据包并将所有其它流量转到 Internet，应命令来配置静态路由？ WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1 Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2 Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/1

4 路由器配置有到达每个目的网络的静态路由。下列哪两种情况需要管理员变更该路由器上配置的静态路由？（选择两项。）目的网络不再存在。拓扑结构发生变化，导致现有的下一跳地址或送出接口无法访问。 5

请参见图示。在到达 10.0.0.0 网络的路由中，/8 表示什么意思？它表示在数据包目的 IP 地址中，从左开始有多少个连续比特位必须与 10.0.0.0 匹配才能使用这条路由。

6 网络管理员在 Router1 中输入了以下命令：ip route 192.168.0.0 255.255.255.0 S0/1/0。Router1 随后收到发往 192.168.据包。在路由表中找到最近刚配置的静态路由之后，Router1 接下来将如何处理该数据包？

将该数据包封装到适合该 WAN 链路的帧中，并将其从 S0/1/0 接口转发出去

7 Router# show interfaces serial 0/1 命令的输出显示了如下内容： Serial0/1 is up, line protocol is down. 线路协议为 down（关闭）的原因最可能是什么？尚未设置时钟频率。

8 请参见图示。公司的网络工程师收到任务，要在两个以太网之间建立连通性，使 10.1.1.0/24 子网上的主机能与 10.1.2.0/2机通信。该工程师被告知公司路由器只能使用静态路由。使用下列哪一组命令可以在这两个以太网之间建立连接？ R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2 R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1

9 两个独立子网上的主机之间无法通信。网络管理员怀疑其中一个路由表中缺少路由。可以使用哪三条命令来帮助排查第 3 层（选择三项。）

ping

traceroute show ip route

10 指向下一跳 IP 的静态路由在路由表中会显示怎样的管理距离和度量？管理距离为 1，度量为 0

11 以下有关 CDP 和图示的说法中，哪项是正确的？路由器 D 上运行的 CDP 会收集有关路由器 A、B、C 和 E 的信息。

默认情况下，路由器 A 将从路由器 B 和 C 接收 CDP 通告。如果路由器 D 和 E 运行的路由协议不同，那么它们不会交换 CDP 信息。路由器 E 可以使用 CDP 来识别路由器 B 上运行的 IOS。

图中的路由器使用如图所示的子网分配。对 Router3 而言，要将内部网络通告给网云，最有效的路由总结是什么？ 192.1.1.0/25

13 请参见图示。为使主机 A 能够连接到 172.16.0.0 网络上的主机 B，应在 Router1 上配置哪种静态路由？ ip route 172.16.0.0 255.255.0.0 S0/0/0

14 Router# show cdp neighbors 命令会显示下列哪些内容？（选择三项。）平台

保持时间本地接口

请参见图示。根据如图所示的输出，该链路的时钟频率会如何确定？ DCE 上配置的频率决定了时钟频率。