CCNA第二学期期末考试
思科第二学期期末试题及答案
Close WindowAssessment System 1. Assessment Selection 2. Assessment Settings 3. Take Assessment 1Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2? 192.168.1.0/24 192.168.0.0/24 192.168.0.0/22 192.168.1.0/22 2If a router is booting with its default configuration register setting and its NVRAM lacks boot system commands, from try to load the IOS image first? ROM RAM NVRAM f lash flash TFTP server 3Refer 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. 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. A static route is established. The traffic for all Class C networks is forwarded to 172.16.1.2. 4Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.) authentication link-state advertisements h old-down timers hold-down timers Spanning Tree Protocol split horizon 5Refer to the exhibit. What information can be determined from the displayed output? E IGRP packets are waiting to be sent to the neighbors. 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 R2 S0/0/1 interf6Which statement is true about the metrics used by routing protocols? A metric is a value used by a particular routing protocol to compare paths to remote networks. A metric is a value used by a particular routing protocol to compare paths to remote networks. A 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. 7Which feature of RIPv2 enables it to function as a classless routing protocol? Subnet masks are included in routing updates. Routing updates are triggered by topology changes. Next-hop addresses are included in routing updates. N ext-hop addresses are included in routing updates. Multicast addresses are used to send routing updates. 8Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured? the IP address of the Fa0/0 interface at R1 t he IP address of the Fa0/0 interface at R1 the IP address of the S0/0/1 interface at R2 the IP address of the S0/0/0 interface at R1 the subnet mask of the S0/0/1 interface at R2 9Which prompt is used to allow a user to change the IP address of an interface on a router? Router> R outer> Router# Router(config)# Router(config-if)# 10Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routeestablish a neighbor adjacency. What should the network administrator do to troubleshoot this problem? Check if the interfaces of the routers are enabled. Check the hello and dead intervals between the routers. C heck the hello and dead intervals between the routers. Check the process ID of both routers. Check if CDP is enabled on all the routers. 11Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interface of Route interface in the same network as the serial interface of Router1? IP 172.16.0.18, subnet mask 255.255.255.0 IP 172.16.32.15, subnet mask 255.255.255.240 I P 172.16.32.15, subnet mask 255.255.255.240 IP 172.16.0.18, subnet mask 255.255.255.252 IP 172.16.32.18, subnet mask 255.255.255.252 12Refer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load 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 file is not located in NVRAM. 13Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will b routing table? 14Refer to the exhibit. Host A is having problems accessing server A. All routers have the same EIGRP configuration a What should be done so that host A can access server A? Add the command n ono auto-summary on all routers. Change the network statements to include a wildcard mask. Adjust the EIGRP hello timers to account for the network delay. Add the command e igrpeigrp log-neighbor-changes on all routers. 15Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is the routers in this topology will respond to this event? Router4 will learn about the failed route 30 seconds later in the next periodic update. Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expire Router5 immediately flushes the unreachable route from its routing table. Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0. 16A network administrator is in charge of two separate networks that share a single building. What device will be require networks and add a common connection to the Internet that can be shared? hub router access point Ethernet switch E thernet switch 17Refer 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? FastEthernet0/0 FastEthernet0/1 Serial0/0/0 Serial0/0/1 18Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the netcommands 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 119Which 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. 20Which candidate route has the longest match for a packet with a destination address of 10.30.16.48? 10.30.0.0/16 10.30.15.0/23 10.30.16.0/24 10.30.16.32/27 10.30.16.32/30 21Which statement is true about the RIPv1 protocol? It is a link-state routing protocol. It excludes subnet information from the routing updates. It uses the DUAL algorithm to insert backup routes into the topology table. It uses classless routing as the default method on the router. 22Which of the following are primary functions of a router? (Choose two.) packet switching microsegmentation domain name resolution path selection flow control 23Refer to the exhibit. Partial results of the show running-config and s how show ip route commands are displayed. Router B rec with a destination address of 10.16.1.97. What will router B do? drop the packet forward the packet via the route to 10.16.1.0 f orward the packet via the route to 10.16.1.64 forward the packet via the route to 10.16.1.64 use the default route 24 What are two ways that a router can learn of the paths to destination networks? (Choose two.) updates from other routers DHCP information broadcasts m anual configuration of routes manual configuration of routes ARP requests from connected routers inspection of the destination IP address in data packets updates from the SMTP management information base 25Refer 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. T he Fa0/1 interfaces of the two routers are configured for different subnets. The subnet mask for the Fa0/0 interface of R1 is incorrect. 26A network administrator is analyzing routing update behavior on a network that has both EIGRP and OSPF configured protocols appear in the output of show ip protocols. However, only EIGRP internal routes appear in the routing tables. correctly explains the scenario? The OSPF protocol has a higher cost than EIGRP. T he OSPF protocol has a higher cost than EIGRPThe EIGRP protocol has a lower metric than OSPF. The EIGRP protocol was configured first on the router. The EIGRP protocol has a lower administrative distance than OSPF. 27Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are d are operational and pings are not blocked on this network. Which ping will fail? from R1 to 172.16.1.1 from R1 to 192.168.3.1 from R2 to 192.168.1.1 from R2 to 192.168.3.1 28Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two de this? (Choose two.) a CSU/DSU device a modem a n Ethernet switch an Ethernet switch a hub a bridge 29 In which situation would a default static route be recommended? when connecting an edge router to the Internet w hen variable length subnet masking is in effect when variable length subnet masking is in effect when there is more than one valid route for a destination network when a destination network has a larger mask than any routes in the routing table 30 Two routers need to be configured within a single OSPF area. Which two components need to be configured on boththis? (Choose two.) t he same process ID the same process ID the same area ID network addresses and wildcard masks the same router ID the same loop back address 231Refer 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. 32Refer to the exhibit. A router learns a route to the 192.168.6.0 network, as shown in the output of the show ip rip database However, upon running the show ip route command, the network administrator sees that the router has installed a diff command, the network administrator sees that the router has installed a diffe 192.168.6.0 network learned via EIGRP. What could be the reason for the missing RIP route? Compared to RIP, EIGRP has a lower administrative distance. Compared to EIGRP , RIP has a higher metric value for the route. Compared to RIP , the EIGRP route has fewer hops. Compared to RIP , EIGRP has a faster update timer. 33 Which mechanism helps to avoid routing loops by advertising a metric of infinity? route poisoning split horizon hold-down timer triggered updates 34 A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 20LANs. Which subnet mask should the administrator use to create the new subnets? 255.255.224.0 255.255.240.0 255.255.248.0 255.255.252.0 35 A technician configures the Fa0/0 interface on a router with ip address 192.168.3.5 255.255.255.252. What additional com. What additional com issued by the technician to activate the interface to forward traffic? Router(config-if)# exitRouter(config-if)# no shutdownRouter(config-if)# clock rateRouter# copy running-config startup-config36 Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a altered to accommodate a topology change? Keep the existing static route and configure a new static route with the correct next hop IP address. Negate the existing static route and configure a new static route with the correct next hop IP address. D o nothing. The existing static route will automatically update the next hop entry with the new IP address. Do nothing. The existing static route will automatically update the next hop entry with the new IP address. Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP a37Refer to the exhibit. What needs to be done to allow these two routers to connect successfully? Add a clock rate to S0/0/0 on R1. Add an interface description to S0/0/1 on R2. C hange the serial interface on R2 to S0/0/0 so that it matches R1. Change the serial interface on R2 to S0/0/0 so that it matches R1. Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1. 38Refer 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. 39 Why is fast convergence desirable in networks that use dynamic routing protocols? Hosts are unable to access their gateway until the network is converged. Routers will not allow packets to be forwarded until the network is converged. Routers may make incorrect forwarding decisions until the network has converged. Routers will not allow configuration changes to be made until the network has converged. 40Refer to the exhibit. When all of the commands that are shown in the exhibit are entered at the correct router promp the router? name cisco router hostname 41Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (C10.0.0.0/8 64.100.0.0/16 128.107.0.0/16 172.16.40.0/24 192.168.1.0/24 192.168.2.0/24 42Refer to the exhibit. A router interface is configured with the command ip address 172.16.3.31 255.255.192.0. Which set o. Which set o values would allow a computer that is connected to the router interface to communicate with remote networks? A: 172.16.3.254 A: 172.16.3.254 B: 255.255.192.0 C: 172.16.3.31 A: 172.16.3.31 B: 255.255.192.0 C: 172.16.3.255 A: 172.16.3.254 B: 255.255.255.0 C: 172.16.3.31 A: 172.16.3.31 B: 255.255.255.0 C: 172.16.3.1 43Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through three.) The router modifies the TTL field, decrementing it by one. The router changes the source IP to the IP of the exit interface. The router maintains the same source and destination IP. The router changes the source physical address to the physical address of the exit interface. The router changes the destination IP to the IP of the exit interface. The router sends the packet out all other interfaces, besides the one it entered the router on. 44Refer 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. N o default route has been configured. 45Refer to the exhibit. Which route will be installed in the routing table on R1 to forward traffic from PC1 to the web s the static route the route learned via OSPF the route learned via EIGRP both routes learned via OSPF and EIGRP 46Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this r a password? The login command was not entered on the console line. The enable password should be an enable secret password. No username and password combination has been configured. Console connections cannot be configured to require users to provide passwords. 47Refer 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? ADC ABC It will load balance the traffic between ADC and ABC It will send the traffic via ABC, and will use ADC as a backup path only when ABC fails. 48A router learns about network 192.168.10.128/27 from multiple sources. Which option represents the best route and w routing table? S 192.168.10.128/27 [1/0] via 192.168.10.226 R 192.168.10.128/27 [120/2] via 192.168.10.226, 00:00:14, Serial0/0/0 O 192.168.10.128/27 [110/1563] via 192.168.10.226, 00:00:09, Serial0/0/0 D 192.168.10.128/27 [90/21026560] via 192.168.10.226, 00:00:16, Serial0/0/0 49Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly cothe 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. Routes are being summarized by R1 but not by R2. 50It is saved in the topology table for use if the primary route fails. It may be backed up by a feasible successor route. It is used by EIGRP to forward traffic to the destination. It is flagged as active in the routing table. After the discovery process has occurred, the successor route is stored in the neighbor table. 51Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem? An incorrect IP address is configured between the two routers. No static route is configured on Router2. A routing loop has occurred. No routing protocol is configured on either of the two routers. 52Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that inte FastEthernet0/1 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. 。
北京航空航天大学2008-2009学年第二学期《计算机网络》期末考试卷及答案(A卷)
北京航空航天大学《计算机网络》2008-2009学年第一学期期末考试试卷（A卷）班级姓名学号成绩一、单项选择(共10题，每题2分，共20分)1.不能用于用户从邮件服务器接收电子邮件的协议是。
A、HTTPB、POP3C、SMTP D.IMAP2.在OSI模型中，N层提供的服务是如何与对等层实体交换信息来实现的。
A、利用N+1层提供的服务以及按N层协议B、利用N层提供的服务以及按N+1层协议c、利用N-1层提供的服务以及按N层协议D、利用N层提供的服务以及按N-1层协议3.根据CSMACD 协议的工作原理，下列情形中需要提高最短帧长度的是。
A.网络传输速率不变，冲突域的最大距离变短B.冲突域的最大距离不变，网络传输速率降低C.上层协议使用TCP的概率增加D.在冲突域不变的情况下减少线路中的中继器数量4.C类P地址的最高三个比特位,从高到低依次是。
A、010B、110C、100D、1015. 如果一个C类网络用掩码255.255.255.248划分子网，那么会有( )个可用的子网。
A.14B.16C.30D.326. IP协议提供的是类型。
A、面向连接的数据报服务B、无连接的数据报服务C、面向连接的虚电路服务D、无连接的虚电路服务7.可以分隔广播域的网络设备是。
A、集线器B、交换机C、路由器D、网桥8.已知子网掩码为255.255.255.192，下面属于同一子网的IP地址组是。
A、200.200.200.160 与 200.200.200.208B、200.200.200.160 与 200.200.200.224C、200.200.200.160 与 200.200.200.105D、200.200.200.160 与 200.200.200.1839.对IP分片数据报的重组工作是在中进行。
A、目的地端系统B、中间主机C、下一跳路由器D、核心路由器10.在哪个范围内的计算机网络可称之为局域网: 。
ccna章节与期末答案
第一章：正确答案：2.4.5解析：由于不需要使用网络设备和专用服务器，对等网络易于创建，复杂性更低，且成本更少。
而且对等网络也没有集中管理。
这种网络安全性更低，不可扩展，而且那些同时充当客户端和服务器的设备可能性能更差正确答案：1解析：正确答案： 3.5解析：选择网络介质的条件包括：所选介质可以成功传送信号的距离、要安装所选介质的环境、必须传输的数据量和速度以及介质和安装的成本。
正确答案：3和4解析：终端设备上的应用程序可以生成数据，更改数据内容并且负责启动封装过程。
正确答案：1和4解析：终端设备会发出通过网络传输的数据。
中间设备会在链路发生故障时通过备用路径传输数据，并且会过滤数据传输以增强安全性。
网络介质提供网络消息的传输通道。
正确答案：4解析：外联网是公司外部的人或企业合作伙伴访问数据的网络区域。
内部网只描述通常仅供内部人员访问的网络区域。
当设备连接到有线网络时，有线 LAN 会受 BYOD（自带设备）影响。
使用大学无线 LAN 的设备多为平板电脑和智能手机。
大学生主要使用无线 WAN 来访问他们的手机运营商网络。
.正确答案：2解析：由于通过 Internet 可以联系在线供应商，所以家庭用户通过 Internet 进行网上购物。
内联网基本上是仅供内部使用的局域网。
外联网是外部合作伙伴访问组织内部特定资源的网络。
家庭用户并不一定使用 LAN 来访问 Internet。
例如，PC 可以通过调制解调器直接连接到 ISP。
正确答案：1解析：内部网这个术语用于表示一个组织的私有局域网和广域网连接。
内部网的设计旨在仅允许该组织的成员、员工或其他获得授权的人员进行访问。
正确答案：2和4解析：电缆和 DSL 均能实现高带宽、始终联网，并提供到主机计算机或 LAN 的以太网连接。
10正确答案：2和3解析：移动电话连接需要使用移动电话网络。
卫星连接通常用于家庭或企业外部不便使用物理布线的位置。
11正确答案：2解析：当对网络资源的请求超出了可用容量时，网络就会变得拥堵。
ccna章节与期末答案
第一章：正确答案：2.4.5•解析：由于不需要使用网络设备和专用服务器，对等网络易于创建，复杂性更低，且成本更少。
而且对等网络也没有集中管理。
这种网络安全性更低，不可扩展，而且那些同时充当客户端和服务器的设备可能性能更差正确答案：1解析：正确答案： 3.5解析：选择网络介质的条件包括：所选介质可以成功传送信号的距离、要安装所选介质的环境、必须传输的数据量和速度以及介质和安装的成本。
正确答案：3和4解析：终端设备上的应用程序可以生成数据，更改数据内容并且负责启动封装过程。
正确答案：1和4解析：终端设备会发出通过网络传输的数据。
中间设备会在链路发生故障时通过备用路径传输数据，并且会过滤数据传输以增强安全性。
网络介质提供网络消息的传输通道。
正确答案：4解析：外联网是公司外部的人或企业合作伙伴访问数据的网络区域。
内部网只描述通常仅供内部人员访问的网络区域。
当设备连接到有线网络时，有线LAN 会受BYOD（自带设备）影响。
使用大学无线LAN 的设备多为平板电脑和智能手机。
大学生主要使用无线WAN 来访问他们的手机运营商网络。
.正确答案：2解析：由于通过Internet 可以联系在线供应商，所以家庭用户通过Internet 进行网上购物。
内联网基本上是仅供内部使用的局域网。
外联网是外部合作伙伴访问组织内部特定资源的网络。
家庭用户并不一定使用LAN 来访问Internet。
例如，PC 可以通过调制解调器直接连接到ISP。
正确答案：1解析：内部网这个术语用于表示一个组织的私有局域网和广域网连接。
内部网的设计旨在仅允许该组织的成员、员工或其他获得授权的人员进行访问。
正确答案：2和4解析：电缆和DSL 均能实现高带宽、始终联网，并提供到主机计算机或LAN 的以太网连接。
10正确答案：2和3解析：移动电话连接需要使用移动电话网络。
卫星连接通常用于家庭或企业外部不便使用物理布线的位置。
11正确答案：2解析：当对网络资源的请求超出了可用容量时，网络就会变得拥堵。
Final
/share/detail/12694909#content思科［Cisco］网院第二学期Final题目参加考试- DsmbISP Final Exam - CCNA Discovery: 在中小型企业或ISP 工作(版本4.1)1请参见图示。
主机A 无法ping 通R1。
应在R1 上执行哪两项配置步骤以解决此问题？（选择两项。
）C正确配置访问该路由器的线路口令。
配置接口速率。
管理性启用接口。
在路由器上配置动态路由协议。
在路由器上正确配置子网掩码。
2 一个网络横跨相距500 英尺（152 米）的两栋楼房。
在电缆路径附近装有一台电力变压器。
该网络应使用哪种类型的电缆？DSTPUTP同轴光纤3 以下哪种说法正确描述了AAA 的功能？A防止对网络进行未授权的访问。
根据目的IP 和端口号过滤流量。
使用户可以发送信息到运行在管理站上的守护进程。
加密数据以保障网络安全性。
4请参见图示。
从图中所示的输出中可得出什么结论？C此路由器上启用了PPP。
接口的带宽设置符合T1 连接要求。
serial0/0/0 接口已管理性关闭。
``````````````````````````````serial0/0/0 接口设置了默认封装。
serial0/0/0 接口设置了子网掩码255.255.255.255。
5请参见图示。
哪些电缆路径段需要使用交叉电缆？CA、D、FB、C、EB、D、EA、C、F6 为了将初始配置加载到一台新的交换机上，网络管理员将一台笔记本电脑通过控制台电缆连接到这台交换机上。
大约一分钟后，网络管理员启动了该交换机，发现交换机前部的SYST LED 从闪烁的绿色转为琥珀色。
请问这意味着什么？笔记本电脑与交换机之间的物理连接不正确。
交换机正在等待配置文件加载。
交换机的一个端口出现故障。
```````````````````` 交换机POST 失败。
D7 UDP 具有哪项特点？ C是一种可靠的传输协议。
要求源主机重新发送未得到确认的数据包。
思科CCNA考试答案(全)
CCNA思科考试答案（全）第 1 章考试1一家拥有10 名员工的小型公司使用单个LAN 在计算机之间共享信息。
哪种类型连接适合此公司？由当地电话服务提供商提供的拨号连接能够使公司方便且安全地连接员工的虚拟专用网络通过当地服务提供商建立的私有专用线路通过当地服务提供商提供的宽带服务（如DSL）答案：4解析：对于这种小型办公室，比较适合通过被称为数字用户线路(DSL) 的常见宽带服务实现Internet 连接，这种服务由当地的电话服务提供商提供。
由于员工人数很少，带宽的问题并不突出。
如果公司较大，在远程站点有分支机构，则专用线路会更加适合。
如果公司员工需要通过Internet 与公司联系，则采用虚拟专用网。
2哪种网络情况需要使用WAN？员工工作站需要获取动态分配的IP 地址。
员工在出差时需要通过VPN 连接到公司电子邮件服务器。
分支机构的员工需要与同一园区网络上的另一座建筑物内的公司总部共享文件。
员工需要访问托管在其建筑物内DMZ 中的公司Web 服务器上的网页。
答案：2解析：当出差的员工需要通过WAN 连接到公司电子邮件服务器时，VPN 将通过WAN 连接在员工笔记本电脑与公司网络之间创建一个安全隧道。
通过DHCP 获取动态IP 地址是LAN 通信的功能。
在企业园区的不同建筑物之间共享文件可通过LAN 基础设施来实现。
DMZ 是企业LAN 基础设施内一个受保护的网络。
3以下哪项描述了WAN 的特征？WAN 和LAN 在同一地理范围内运行，但有串行链路。
WAN 网络归运营商所有。
所有串行链路均被视为WAN 连接。
WAN 可提供到园区主干网的终端用户网络连接。
答案：2解析：WAN 可用于将企业LAN 互连到远程分支机构站点LAN 和远程工作人员站点。
WAN 归运营商所有。
虽然WAN 连接一般通过串行接口实现，但并不是所有串行链路均连接至WAN。
LAN（而非WAN）可在组织中提供终端用户网络连接。
4电路交换WAN 技术的两个常见类型是什么？（请选择两项。
CISCO第二学期期末考试答案
C I S C O第二学期期末考试答案IMB standardization office【IMB 5AB- IMBK 08- IMB 2C】端口过滤和访问列表通过什么方式来增强网络安全防止特定类型的通信到达特定网络主机。
/遭受各类拒绝服务攻击时提醒网络管理员。
防止病毒、蠕虫和特洛伊木马感染主机计算机和服务器。
可对机密数据通信进行加密和身份认证。
某黑客尝试获取存储在公司网络内部某台服务器上的机密信息。
网络安全解决方案检测完整的数据包，确定这是一个威胁，所以阻止该数据包进入内部网络。
这一过程中哪项安全措施保护了网络 IDS IPS /基于主机的防火墙Anti-X 软件在图中所示的其中一台路由器上执行 show ip route 命令，显示下列输出：1此命令是从哪一台路由器执行的 A B C /D请参见图示。
网络管理员使用以下命令在 RTB 上配置了一条默认路由：RTB(config)# ip route 0.0.010.1.1哪种路由协议可实现不同自治系统之间的路由信息交换 OSPF EIGRP RIP BGP /下列关于 FTP 协议被动数据连接的说法中哪一项正确服务器发起数据传输连接。
服务器将其 IP 地址和一个随机端口号通过控制流转发给 FTP 客户端。
/防火墙不会允许与网络内的主机进行被动数据连接。
客户端将数据转发至服务器的端口 21。
下列关于反向查找 DNS 区域的说法中哪一项正确常用于用户浏览 Internet 时。
是正向查找区域的备份。
动态更新资源记录。
将 IP 地址解析为完全限定的域名。
/下列关于 DNS 层级的说法中哪两项正确（选择两项。
）根服务器维护 Internet 上所有服务器的记录。
DNS 依靠分布于不同层级的服务器维护记录。
/所有 DNS 服务器均负责管理整个 DNS 结构的“域名-IP”映射。
域名解析过程从位于 DNS 顶层的服务器开始。
根服务器负责维护有关如何到达顶层域名服务器的记录。
ccna第二学期练习答案
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。
4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。
）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-config6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)#Sydney(config-if)# no shutdownSydney(config-if)# clock rate 560007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。
8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 4R1(config-line)# password check123R1(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、CONSOLE12请参见图示。
ccna第二学期练习答案
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。
4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.12345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-config6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 201.100.53.2 255.255.255.0Sydney(config-if)# no shutdownSydney(config-if)# clock rate 560007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。
8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 4R1(config-line)# password check123R1(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、CONSOLE12请参见图示。
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。
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1关于数据包通过路由器传输时的封装和解封的叙述,下列哪三项是正确的？（选择三项。
) 路由器修改 TTL 字段，将其值减 1.路由器将源 IP 更改为送出接口的 IP。
路由器保持相同的源 IP 和目的 IP。
路由器将源物理地址更改为送出接口的物理地址。
路由器将目的 IP 更改为送出接口的 IP。
路由器会从所有接口将数据包转发出去,包括路由器接收数据包时使用的那个接口.Option 1, Option 3， and Option 4 are correct。
2请参见图示。
当数据包发往哪两个网络时需要路由器执行递归查找？（选择两项。
)10。
0。
0.0/864。
100.0。
0/16128。
107.0。
0/16172。
16.40.0/24192.168.1。
0/24192.168.2.0/24Option 1 and Option 6 are correct.3对于为防止路由环路而通过毒性反转实现的水平分割方法,哪两项叙述正确？（选择两项。
) 所有 Cisco IOS 都会默认启用此方法。
会将一个表示无穷大度量的值分配给路由以将其毒化。
将毒化路由更新发回该更新的发送接口。
指示路由器将可能会影响路由的更改保持一段特定的时间。
限制数据包在被丢弃之前能够在网络中传输的跳数。
Option 2 and Option 3 are correct.4网络管理员在所示网络图中的路由器 B 和 C 上启用了 RIP。
什么命令可防止向路由器 A 发送 RIP 更新?A(config)# router ripA（config-router)# passive—interface S0/0B(config）＃ router ripB（config—router）＃ network 192.168。
25.48B（config-router)# network 192。
168.25.64A(config）＃ router ripA(config—router)＃ no network 192。
168。
25。
32B(config)# router ripB(config—router)# passive—interface S0/0A（config）# no router rip2 points for Option 45请参见图示。
根据如图所示的输出，下列哪两项陈述是正确的?（选择两项.）所有路由都处于稳定状态.每条路由都有一个可行后继.两台路由器之间的串行接口关闭。
EIGRP 的管理距离已设置为 50.R1 上已运行了 show ip eigrp topology 命令。
Option 1 and Option 5 are correct.6请参见图示。
下列关于 Router1 路由表的陈述,哪三项是正确的？（选择三项。
）到网络 172.16.0。
0 的路由的 AD 为 156160.FastEthernet0/0 具有到达网络 192。
168。
0。
16 的最佳路径。
EIGRP 路由的 AD 已经手动更改为默认值以外的其它值。
Router1 正同时运行着 EIGRP 和 OSPF 路由过程。
仅能通过默认路由到达网络 172。
17.0。
0。
尚未配置任何默认路由.Option 3， Option 4， and Option 6 are correct.7下列路由器组件和操作的配对中，哪两项是正确的？（选择两项。
)DRAM —加载 bootstrapRAM —存储操作系统闪存—启动时执行诊断NVRAM —存储配置文件ROM —存储备份配置文件POST —运行硬件模块诊断Option 4 and Option 6 are correct.8在两台路由器能够使用 OSPF 形成邻居邻接关系之前必须完成哪两项任务？（选择两项。
）路由器必须选举出指定路由器。
路由器必须在网络类型方面达成一致。
路由器必须使用相同的 dead 时间间隔。
路由器必须交换链路状态请求。
路由器必须交换数据库描述数据包.Option 2 and Option 3 are correct.9下列哪两项是路由器的功能？(选择两项。
）连接多个 IP 网络.通过使用第 2 层地址控制数据流。
确定发送数据包的最佳路径.管理 VLAN 数据库。
扩大广播域。
Option 1 and Option 3 are correct。
10请参见图示。
下列有关所示网络中快速以太网接口的陈述，哪一项是正确的?帧离开 R1 的接口 Fa0/0，源 MAC 地址为 000C。
3010。
9260。
10。
1.1。
0/24 中的主机将使用 172.16.3。
1/24 作为其默认网关。
除非对 R1 的 Fa0/0 接口发出 no shutdown 命令，否则 R1 和 R2 之间不会转发数据包。
R2 的 Fa0/0 接口可以使用 IP 地址 172.16.4。
1/24 配置，配置后在该链路上仍然具有连通性。
2 points for Option 111请参见图示。
网络管理员将此命令添加到路由器 R1： ip route 192。
168。
2。
0 255.255.255.0 S0/0/0。
添加此命令会产生什么结果？此路由会在网络中自动传播。
发往网络 172.16。
1.0 的流量被转发到网络 192.168.2.0。
建立一条静态路由。
所有 C 类网络的流量都被转发到 172.16。
1。
2.2 points for Option 312请参见图示。
命令 ip route 0.0.0.0 0.0.0.0 S0/0/0 已在路由器 R2 上生效。
此命令会产生哪两项结果？(选择两项。
)会在路由表中更新静态路由。
来自 Internet 的流量会转发给 R2。
来自源网络 172.16.0。
0/22 的流量会被拦截。
该路由会被指定为到路由表中所有未定义的网络的默认路由。
所有广播都会通过 R2 的 S0/0/0 接口转发.Option 1 and Option 4 are correct.13请参见图示. 网络管理员从 R3 上成功 ping 通了 R1。
接下来,管理员在 R3 上运行了show cdp neighbors 命令。
图中显示了该命令的输出。
输出中缺少 R1 的两个原因是什么?（选择两项。
）R1 和 R3 之间有连通性问题。
R1 的 Fa0/0 接口配置了不正确的 IP 地址.在 R1 上运行了 no cdp run 命令.对 R3 的 Fa0/1 接口运行了 no cdp enable 命令。
关闭了 R1 的电源。
Option 3 and Option 4 are correct.14请参见图示. 所有路由器都正确配置了默认值，且正在运行 OSPF 路由协议. 此网络已完全收敛。
192。
168。
3.0/24 网络中的主机要与 192.168。
2。
0/24 网络中的主机通信。
会使用哪条路径来传输数据?数据会通过 R3-R2 传输.数据会通过 R3—R1-R2 传输。
流量会在两条路径（R3—R2 和 R3-R1-R2）间进行负载均衡。
数据会通过 R3—R2 传输,而另一条通过 R3-R1—R2 的路径则会留作备用路径。
2 points for Option 215下列哪两种情形需要使用链路状态协议？（选择两项。
）网络对收敛速度的要求极高。
网络非常庞大.网络管理员没有足够的知识来配置路由协议及排查其故障。
网络采用的是平面设计。
路由器的性能较低。
Option 1 and Option 2 are correct。
16请参见图示。
突出显示的值 120 表示什么意思？路由协议计算出的度量。
DUAL 算法使用该值来确定该链路的带宽.路由协议的管理距离.收到下一个更新前的抑制时间，单位为秒。
2 points for Option 317在复杂的实验室测试环境中，路由器通过使用 RIP 路由进程发现了四条通往192.168.1.0/24 的路径。
其中哪条路由会被添加到路由表中？R 192。
168.1。
0/24 ［120/3] via 192。
168。
110.1, 00:00：17, Serial0/1/0R 192.168.1。
0/24 ［120/2］ via 192.168.200.1, 00：00：17， Serial0/0/0R 192.168.1。
0/24 ［120/1］ via 192。
168.100.1, 00：00:17， Serial0/0/1R 192。
168.1。
0/24 [120/4] via 192.168。
101。
1, 00：00:17， Serial0/1/12 points for Option 318请参见图示。
所有路由器都已正确配置为使用 RIP 路由协议（使用默认设置），并且网络已完全收敛。
路由器 A 要将数据转发给路由器 E。
下列哪一个有关路由路径的说法正确？路由器 A 会通过路由表中列出的 A-D—E 路径发送数据。
路由器 A 会将流量在 A-B—E 和 A—C-E 之间进行负载均衡.路由器 A 会确定所有路径都具有相等的开销度量。
路由器 A 会通过 A-D—E 发送数据，并将 A—B-E 和 A-C—E 留作备用路径。
2 points for Option 319一台使用 RIP 路由协议的路由器在路由表中存有到某个网络的路由条目。
后来,路由器收到另一条到同一目的网络的路由条目的更新，且与前者比，该路由跳数较少. 对于此更新，路由器会采取什么操作？路由器会将更新信息附加到路由表中。
路由器会将路由表中到该网络的路由条目标记为无效.路由器会用新信息替换现有的路由表条目。
路由器会忽略新的更新.2 points for Option 320请参见图示。
PC1 无法访问 Internet。
此问题的原因是什么？两台路由器之间配置了错误的 IP 地址.Router2 上未配置静态路由。
出现了路由环路。
两台路由器上均未配置路由协议。
2 points for Option 321请参见图示. 所有路由器都配置为运行 RIPv1，并已完全收敛. R3 会收到下列哪项所述的路由更新？192。
168.1.0/24 和 192.168.2。
0/24 的更新172。
16。
2.0/24 和 172.16.3。
0/24 的更新172。
16.1。
0/24、172。
16.2。
0/24 和 172。
16。
3.0/24 的更新172.16。
0.0/16 的更新2 points for Option 422下列哪种机制可通过通告无穷大度量来防止路由环路？路由毒化水平分割抑制计时器触发更新2 points for Option 123哪种路由协议默认使用带宽和延迟来计算路由的度量？RIPv1RIPv2OSPFEIGRP2 points for Option 424请参见图示. 两台路由器都使用 RIP 协议。