思科第二学期第三章测试答案
思科《计算机网络》第三章考试答案
思科《计算机⽹络》第三章考试答案Introduction to Networks (版本 6.00) - ITN 第 3 章考试答案1 主机计算机在 TCP/IP 模型的传输层解封消息时，会处理哪种 PDU？· 位· 帧· 数据包· 数据段2 请参见图⽰。
主机 A 正在尝试与服务器 B 联系。
哪两种说法正确描述了主机 A 在该流程中⽣成的地址？（请选择两项。
）· 以服务器 B 的 MAC 地址为⽬的 MAC 地址的帧。
· 以服务器 B 的 IP 地址为⽬的 IP 地址的数据包。
· 以路由器 B 的 IP 地址为⽬的地址的数据包。
· 以路由器 A 的 MAC 地址为⽬的 MAC 地址的帧。
· 以路由器 A 的 IP 地址为⽬的 IP 地址的数据包。
· 以交换机 A 的 MAC 地址为⽬的 MAC 地址的帧。
3 请参见图⽰。
如果 Host1 要传送⽂件到服务器，将会使⽤ TCP/IP 模型的哪些层？· 应⽤层、传输层、互联⽹层和⽹络接⼊层· 仅应⽤层、传输层、⽹络层、数据链路层和物理层· 仅应⽤层、互联⽹层和⽹络接⼊层· 仅应⽤层和互联⽹层· 应⽤层、会话层、传输层、⽹络层、数据链路层和物理层· 仅互联⽹层和⽹络接⼊层4将每个描述与其对应的术语配对。
（并⾮所有选项都会⽤到）。
此过程确定何时开始在⽹络上发送消息此过程将信息从⼀种格式转换成另⼀种可传输的格式（消息编码）此过程将⼀种消息格式放⼊另⼀消息格式内（消息封装）此过程将⼀种消息格式从另⼀种消息格式中解压出来此过程在通过⽹络发送之前将⼀个长消息分解成⼀个个⼩⽚段（消息⼤⼩）5 哪种类型的通信会向局域⽹上的所有设备发送消息？· 组播· 全播· ⼴播· 单播6 在封装期间，OSI 模型的哪⼀层会添加⼀个逻辑地址？· 传输层· 数据链路层· 物理层· ⽹络层7 哪个过程⽤于将⼀个消息放⼊另⼀消息内以从源传输到⽬的地？· 访问控制· 封装· 解码· 流量控制8 什么是专有协议？· 由私⼈组织开发且能在所有供应商硬件上运⾏的协议· 可供所有组织或供应商⾃由使⽤的协议· 称为 TCP/IP 协议簇的协议集合· 由控制协议定义和操作的组织开发的协议9 OSI 模型的哪三层与 TCP/IP 模型的应⽤层功能相当？（选择三项。
CCNA02-final3
1Which of the following are required when adding a network to the OSPF routing process conf iguration? (Choose three.)network addressloopback addressautonomous system numbersubnet maskwildcard maskarea ID2Using default settings, what is the next step in the router boot sequence after t he IOS loads from flash?Perf orm the POST routine.Search for a backup IOS in ROM.Load the bootstrap program f rom ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.3Refer to the exhibit. What is the most efficient summarization of the routes attached to router R1?198.18.0.0/16198.18.48.0/21198.18.32.0/22198.18.48.0/23198.18.49.0/23198.18.52.0/224Refer 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 statem (Choose three.)The missing information f or Blank 1 is the command show ip route .The missing information f or Blank 1 is the command debug ip route .The missing information f or Blank 2 is the number 100.The missing information f or Blank 2 is the number 120.The missing information f or Blank 3 is the letter R.The missing information f or Blank 3 is the letter C.5Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose t wo.)10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/246When 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 hav e the same best metric are added to the routing table.The router f irst selects routes with the lowest administrative distance. The resulting routes are then prioritized by metric and the routes with the best metric arouting table.The router selects the routes with the lowest administrativ e distance. All routes with the same lowest administrative distanc e are added to the routing table.The router installs all routes in the routing table but uses the route with the best metric most when load balancing.7Refer to the exhibit. All routers in the network are running RIPv2 and EIGRP with default routing protocol settings and have interfaces configured with the bandwidths t exhibit. Which protocol will be used and how will traffic between the Router1 LAN and Router5 LAN be routed through the network?RIPv2 will load balance across both paths between Router1 and Router5.EIGRP will load balance across both paths between Router1 and Router5.RIPv2 traffic will use the path Router1, Router2, Router5 because it has the least hops.EIGRP traffic will use the path Router1, Router3, Router4, Router5 because it has the best metric.8Of the listed routing protocols, which two will propogate LSPs to all neighbors? (Choose two.)IS-ISEIGRPOSPFRIPv1RIPv29Refer to the exhibit. Routers 1 and 2 are directly connected over a serial link. Pings are f ailing between the two routers. W hat change by the administrator will correctSet the encapsulation on both routers to PPP.Decrease the bandwidth on Serial 0/1/0 on router 2 to 1544.Change the cable that connects the routers to a crossover cable.Change the IP address on Serial 0/1/0 on router 2 to 192.168.0.1/30.10Refer 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 conf igured.11Which 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.12Refer to the exhibit. A ping from R1 to 10.1.1.2 is successful, but a ping from R1 to 192.168.2.0 fails. What is the cause of this problem?There is no gateway of last resort at R1.The serial interf ace between the two routers is down.A default route is not configured on R1.The static route for 192.168.2.0 is incorrectly conf igured.13Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required toSwitch the cable with a known working cable.Issue the no shutdown command on the interface.Configure the interf ace as a loopback interface.Set the encapsulation for the interface.14Which two locations can be the source of the Cisco IOS that is used by a router during the bootup process? (Choose two.)flash memoryRAMNVRAMTFTP serverconfiguration register15All routers in a network are configured in a single OSPF area with the same priority value. No loopback interface has been set on any of the routers. Which secondrouters use to determine the router ID?The highest MAC address among the active interfaces of the network will be used.There will be no router ID until a loopback interf ace is configured.The highest IP address among the activ e FastEthernet interfaces that are running OSPF will be used.The highest IP address among the activ e interfaces will be used.16Refer to the exhibit. A network administrator has conf igured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interf ace will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/117Refer to the exhibit. All routers are properly configured with default configurations and are running the OSPF routing protocol. The network is f ully converged. A host on th with a host on the 192.168.2.0/24 network.Which path will be used to transmit the data?The data will be transmitted v ia R3-R2.The data will be transmitted v ia R3-R1-R2.The traffic will be load-balanced between two paths — one via R3-R2, and the other via R3-R1-R2.The data will be transmitted v ia R3-R2, and the other path via R3-R1-R2 will be retained as the backup path.18Which two situations require the use of a link-state protocol? (Choose two.)Fast convergence of the network is critical.The network is very large.The network administrator has limited knowledge to configure and troubleshoot routing protocols.The network is a flat network.The capacity of the router is low.19Refer 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 v alue 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.20In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this nD 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/021Which 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.22Refer to the exhibit. The 10.4.0.0 network f ails. What mechanism prevents R2 f rom receiving false update information regarding the 10.4.0.0 network?split horizonhold-down timersroute poisoningtriggered updates23Which 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 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.24Refer to the exhibit. Both routers are using the RIPv2 routing protocol and static routes are undef ined. R1 can ping 192.168.2.1 and 10.1.1.2, but is unable to ping 192.16 What is the reason for the ping f ailure?The serial interf ace between two routers is down.R2 is not forwarding the routing updates.The 192.168.4.0 network is not included in the RIP configuration of R2.RIPv1 needs to be configured.25Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Adv ertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.26Refer to the exhibit. When the show cdp neighbors command is issued f rom 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-227Refer to the exhibit. Although R2 is conf igured correctly, host A is unable to access the Internet. What are two static routes that can be c onfigured on R1, either of which w (Choose two.)ip route 0.0.0.0 0.0.0.0 Fa0/0ip route 0.0.0.0 0.0.0.0 Fa0/1ip route 0.0.0.0 0.0.0.0 10.1.1.1ip route 0.0.0.0 0.0.0.0 10.1.1.2ip route 209.165.202.0 255.255.255.0 10.1.1.128Which component is typically used to connect the WIC interface of a router to a CSU/DSU?V.35 cableRJ-45 adaptercrossover cablestraight-through cable29Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interf ace of Router2 in order to put the interf ace in the same networ interface of Router1?IP 172.16.0.18, subnet mask 255.255.255.0IP 172.16.32.15, subnet mask 255.255.255.240IP 172.16.0.18, subnet mask 255.255.255.252IP 172.16.32.18, subnet mask 255.255.255.25230Refer 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 D31Refer to the exhibit. OSPF is used f or the routing protocol and all interf aces are configured with the correct IP addresses and subnet masks. During testing, it is foun 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.32You hav e been asked to explain converged networks to a trainee. How would you accurately describe a converged network?A network is converged when all routers have f ormed an adjacency.A network is converged immediately after a topology change has occurred.A network is converged when all routers flush the unreachable networks from their routing tables.A network is converged after all routers share the same information, calculate best paths, and update their routing tables.33 A network administrator is in charge of two separate networks that share a single building. What dev ice will be required to connect the two networks and add a comthe Internet that can be shared?hubrouteraccess pointEthernet switch34Which port should a terminal emulator be connected to in order to access a router without network connectivity?T1serialconsoleFastEthernet35Refer to the exhibit. What needs to be done to allow these two routers to connect successf ully?Add a clock rate to S0/0/0 on R1.Add an interface description to S0/0/1 on R2.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 R1.36Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this router without entering 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 conf igured to require users to provide passwords.37Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?10.1.1.110.1.1.2172.16.1.1192.168.1.138Refer to the exhibit. The entire 192.168.1.0 network has been allocated to address hosts in the diagram. Utilizing VLSM with contiguous address blocks, which set of pref ixes could be used to create an addressing solution with a minimum waste of IP addresses?39What is a function of a router?It extends the Layer 2 broadcast domain.It eliminates collisions among PCs on the same local network.It provides connectivity among PCs on the same physical segment.It forwards packets to different IP networks based on Layer 3 inf ormation.40Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?RIPRIPv2EIGRPstatic routes41Refer to the exhibit. A network administrator configures a static route on router R1 to reach the 192.168.1.0/24 network. Which IP address should be used as the next ip route command?192.168.1.1192.168.2.1192.135.250.1192.135.250.242Refer to the exhibit. The network is conf igured with RIPv2. However, network administrators notice that communication cannot be successfully completed f rom one L network administrator issues the show ip route command on the HQ router. Based on the output, what should be done to correct the problem?Disable the load balancing feature of RIPv2.Issue the no auto-summary command for RIPv2.Replace RIPv2 with EIGRP which supports VLSM.Make sure that the network statements include the correct subnet mask.43Which protocol is used by EIGRP to deliver and receive update packets?FTPRTPTCPTFTPUDP44Refer to the exhibit. What OSPF network statements are required for the router B to adv ertise the three networks that are attached?router ospf 1network 10.0.0.0 0.0.0.255 area 0router ospf 1network 10.1.1.0 0.3.255.255 area 0network 10.10.1.0 0.255.255.255 area 0network 10.20.1.0 0.255.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.255.255 area 0network 10.20.1.0 0.0.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.0.255 area 0network 10.20.1.0 0.0.0.255 area 045Which two v alues are used by default to calculate a metric in EIGRP? (Choose two.) loaddelayreliabilityhop countbandwidth46Refer to the exhibit. Which statement is true concerning the routing configuration?Using dy namic routing instead of static routing would hav e required f ewer configuration steps.The 10.1.1.0/24 and 10.1.2.0/24 routes have adjacent boundaries and should be summarized.Packets routed to the R2 Fast Ethernet interface require two routing table lookups.The static route will not work correctly.47Refer to the exhibit. On the basis of the show running-config output, which option correctly ref lects the routes that will be listed in the R2 routing table?48Refer to the exhibit. Which command should be issued to configure the address of the router interface that is attached to this computer?Router(config-if)# ip address 192.168.2.1 255.255.255.0Router(config-if)# ip address 192.168.2.2 255.255.255.0Router(config-if)# ip address 192.168.0.1 255.255.255.0Router(config-if)# ip address 192.168.0.2 255.255.255.049Refer to the exhibit. Which route will be removed from the routing table if manual EIGRP summarization is disabled on the Serial0/0/0 interface of Router3?0.0.0.0/0172.16.0.0/16172.16.1.0/24172.16.3.0/3050Refer to the exhibit. All interfaces are addressed and f unctioning correctly. The network administrator runs the tracert command on host A. Which two f acts could be output of this command? (Choose two.)The gateway for Host A is missing or improperly conf igured.The gateway for Host B is missing or improperly conf igured.The entry for 192.168.1.0/24 is missing f rom the routing table of R1.The entry for 192.168.1.0/24 is missing f rom the routing table of R2.The entry for 192.168.2.0/24 is missing f rom the routing table of R1.The entry for 192.168.2.0/24 is missing f rom the routing table of R2.。
思科 第二学期 答案 1-4章
第一章路由和数据包转发介绍1．哪两项说法正确描述了路由器的组件？（选择两项）（B、D）A．RAM 永久存储着在启动过程中使用的配置文件 B．ROM 含有硬件模块所执行的诊断程序C．NVRAM 存储着在启动过程中使用的 IOS 的备份副本 D．重新启动时闪存中的内容不会丢失E．ROM 包含最新而且最完整的 IOS 版本 F．闪存包含用于标识 IOS 位置的启动系统命令2．图中的哪些接口可用于租用线路 WAN 连接？（选择两项）（A、D）A．1B．2C．3D．4E．5F．63．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？? （B）A．启动过程将重置 B．路由器将提示用户进行响应，以进入设置模式 C．启动过程将停止，直到获得有效的配置文件D．路由器将根据上次的有效配置生成默认配置文件 E．路由器将监控本地流量，以确定路由协议配置要求4．以下哪一项正确描述了路由器启动时的顺序？? （A）A．加载 bootstrap、加载 IOS、应用配置 B．加载 bootstrap、应用配置、加载 IOSC．加载 IOS、加载 bootstrap、应用配置、检查硬件 D．检查硬件、应用配置、加载 bootstrap、加载 IOS5．加载配置文件时的默认顺序是怎样的？? （C）A．NVRAM、FLASH、ROM B．FLASH、TFTP、CONSOLE C．NVRAM、TFTP、CONSOLE D．FLASH、TFTP、ROM6．在启动过程中，路由器可以从哪些位置加载 Cisco IOS？（选择两项）? （B、E）A．RAM B．TFTP 服务器 C．NVRAM D．设置例程 E．闪存 F．终端7．下列哪些是路由器的功能？（选择三项）? （A、C、D）A．分组交换 B．网段扩展 C．广播域分段 D．根据逻辑编址选择最佳路径 E．根据物理编址选择最佳路径8．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）? （A、D、E）A．通过解开第 2 层帧报头来解封第 3 层数据包 B．通过 IP 报头中的目的 MAC 地址在路由表中查找下一跳地址C．解封第 3 层数据包时将第 2 层帧报头保持原样 D．通过 IP 报头中的目的 IP 地址在路由表中查找下一跳地址E．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F．将第 3 层数据包封装成特殊的第 1 层帧，并将该帧转发到送出接口9．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。
思科第三章
试题反馈报告Routing and Switching Essentials (版本- RSE 第3 章考试以下是针对您未获得满分的试题给出的反馈。
某些交互式试题可能不显示您的答案。
分项分数：1 开发用于互连不同互联网服务提供商的动态路由协议是什么1开发用于互连不同互联网服务提供商的动态路由协议是什么正确响应您的响应o EIGRPo RIPo BGPo OSPFBGP 是开发用来互连不同级别的ISP 以及ISP 与部分更大的专用客户端的协议。
此试题参考以下领域的内容：Routing and Switching Essentials动态路由协议概述2 哪一路由协议限于小型网络实施，因其不适合大型网络的增长2哪一路由协议限于小型网络实施，因其不适合大型网络的增长正确响应您的响应o OSPFo IS-ISo EIGRPo RIPRIP 协议是使用不支持更大网络的指标创建的。
其他路由协议（包括OSPF、EIGRP 和IS-IS）具有良好的扩展性，可以适应网络发展以及更大的网络。
此试题参考以下领域的内容：Routing and Switching Essentials动态路由协议概述3 动态路由协议执行哪两项任务（选择两项。
）3动态路由协议执行哪两项任务（选择两项。
）正确响应您的响应o更新和维护路由表o分配IP 地址o网络发现o发现主机o传播主机默认网关此试题参考以下领域的内容：Routing and Switching Essentials动态路由协议概述4 较之静态路由，何时使用动态路由协议会更有利4较之静态路由，何时使用动态路由协议会更有利正确响应您的响应o在具有单个退出点的末端网络上o在预期规模不会增长的使用小型网络的组织中o在存在很多拓扑变化的网络上o在路由器出现性能问题的组织中动态路由协议使用更多的路由器资源，适合更大的网络，在正在发展和改变的网络上更有用。
此试题参考以下领域的内容：Routing and Switching Essentials动态与静态路由5 何时使用静态路由而不是动态路由协议会更有利5何时使用静态路由而不是动态路由协议会更有利响应您的响应o在具有大量冗余路径的网络上o在往往会遇到链路故障的网络上o在预期规模不断增长的网络上o在动态更新会带来安全风险的网络上动态路由协议被视为安全性不如静态路由，因为其通常在数据流量交叉的相同链路上转发路由信息。
思科计算机概论第三章ITE答案
思科计算机概论第三章ITE答案在计算机领域中，思科计算机概论是一门重要的基础课程。
其中第三章的内容更是涵盖了众多关键知识点。
首先，让我们来了解一下第三章所涉及的主要概念。
这一章重点探讨了计算机网络的基本原理和相关技术。
其中包括网络拓扑结构，这是构建网络的基础框架，就好像是城市道路的规划布局一样。
常见的拓扑结构有总线型、星型、环型、树型和网状型。
总线型结构简单，成本低，但一旦总线出现故障，整个网络都会受到影响；星型结构以中心节点为核心，易于管理和监控，但中心节点的负担较重；环型结构数据传输较为稳定，但某个节点故障可能导致整个网络瘫痪；树型结构扩展方便，适合分层管理；网状型结构则具有高度的可靠性和容错性，但建设和维护成本较高。
接着，是网络协议。
这就好比是网络世界中的“语言规则”，使得不同的设备能够相互理解和交流。
TCP/IP 协议是目前应用最为广泛的网络协议簇，它包括了 IP 协议、TCP 协议、UDP 协议等。
IP 协议负责为网络中的设备分配地址，并确定数据的传输路径；TCP 协议提供可靠的数据传输服务，确保数据的准确无误；UDP 协议则提供了一种快速但不可靠的数据传输方式，适用于对实时性要求较高但对数据准确性要求相对较低的应用。
在网络设备方面，路由器和交换机是至关重要的。
路由器就像是网络中的交通警察，负责为数据包选择最佳的传输路径，实现不同网络之间的连接。
交换机则主要用于在同一网络内转发数据包，提高网络的传输效率。
网络安全也是第三章的一个重要内容。
随着网络的普及和发展，网络安全问题日益突出。
防火墙是常见的网络安全设备之一，它可以根据预设的规则阻止或允许网络流量的通过，防止未经授权的访问。
加密技术则通过对数据进行加密处理，使得即使数据被窃取，也难以被解读。
谈到网络性能优化，带宽管理是其中的关键。
合理分配带宽资源，可以确保重要的应用和服务能够获得足够的网络资源，从而提高网络的整体性能。
在实际应用中，我们可以通过网络拓扑结构的合理选择、协议的正确配置、设备的优化部署以及安全措施的有效实施，来构建一个高效、稳定和安全的计算机网络。
思科计算机概论第三章ITE答案
思科计算机概论第三章ITE答案在学习思科计算机概论的过程中，第三章的内容往往是一个关键的转折点。
这一章通常涵盖了一系列重要且基础的计算机概念和技术，对于我们深入理解计算机系统的运作原理具有重要意义。
首先，让我们来探讨一下第三章中关于计算机硬件的部分。
在这一部分，我们了解到中央处理器（CPU）的核心作用。
CPU 就像是计算机的大脑，负责处理和执行各种指令。
它的性能指标，如时钟频率、核心数量和缓存大小，直接影响着计算机的运行速度和处理能力。
内存也是一个关键的硬件组件。
内存分为随机存取存储器（RAM）和只读存储器（ROM）。
RAM 用于暂时存储正在运行的程序和数据，其容量的大小决定了计算机能够同时处理任务的多少和复杂程度。
而ROM 则存储着计算机启动时所需的基本程序和数据，通常是只读的，不能随意更改。
说到存储设备，硬盘和固态硬盘（SSD）是常见的选择。
硬盘具有较大的存储容量，但读写速度相对较慢。
而 SSD 则凭借其快速的读写性能，大大提高了数据的传输速度，使计算机的启动和程序加载更加迅速。
接下来，我们看看第三章中关于计算机网络的内容。
网络拓扑结构是网络规划中的重要概念，包括总线型、星型、环型、树型和网状型等。
不同的拓扑结构具有各自的优缺点，适用于不同的场景。
在网络通信中，IP 地址和子网掩码是至关重要的。
IP 地址用于在网络中标识设备的位置，而子网掩码则用于确定网络的范围。
了解如何进行IP 地址的分配和子网的划分，对于构建有效的网络架构非常关键。
网络协议也是不可忽视的一部分。
例如，TCP/IP 协议是互联网通信的基础，它包括了 TCP（传输控制协议）和 IP（网际协议）等多个子协议。
TCP 保证了数据传输的可靠性，而 IP 负责数据的路由和寻址。
然后，再谈谈操作系统在第三章中的地位。
操作系统是计算机系统的管理核心，它负责资源的分配、任务的调度和设备的管理。
常见的操作系统如 Windows、Linux 和 macOS ，它们都有着各自的特点和适用场景。
思科第2学期第3章答案
1下列有关实施 VLAN 的说法中，哪两项正确？（选择两项。
）冲突域的大小会减小。
网络中所需交换机的数量会减少。
VLAN 会对主机进行逻辑分组，而不管它们的物理位置如何。
由于增加了中继信息，网络负载会显著增加。
某一 VLAN 中的设备不会收到其它 VLAN 中的设备所发出的广播。
答案 答案 最高分值correctness of response Option 3 and Option 5 are correct.22下列哪三项陈述准确描述了 VLAN 类型？（请选择三项。
）管理 VLAN 是指经过配置可以访问交换机管理功能的任何 VLAN 。
数据 VLAN 用于传输 VLAN 管理数据和用户生成的流量。
未经配置的交换机初始启动后，所有端口都属于默认 VLAN 。
已分配本地 VLAN 的 802.1Q 中继端口同时支持标记流量和无标记流量。
语音 VLAN 用于支持网络中的用户电话和电子邮件流量。
VLAN 1 总是用作管理 VLAN 。
答案答案最高分值 correctness ofresponse Option 1, Option 3, and Option 4 are correct.33网络管理员正在确定 VLAN 中继链路的最佳位置。
哪两种类型的点对点连接会使用 VLAN 中继两项。
）使用多个 VLAN 的两台交换机之间交换机和客户端 PC 之间交换机和带有 802.1Q 网卡的服务器之间交换机和网络打印机之间共享同一 VLAN 的两台交换机之间答案 答案 最高分值correctness of response Option 1 and Option 3 are correct.24请参见图示。
某帧在 PC-A 与 PC-B 之间传输。
下列有关此帧 VLAN 标记的说法中，哪项是正确的？当此帧离开 PC-A 时，会被添加 VLAN 标记。
当交换机接收此帧时，此帧会被添加 VLAN 标记。
当此帧从端口转出至 PC-B 时，会被添加 VLAN 标记。
思科_第二学期_答案_1-4章
1请参见图示。
下列哪组设备仅包含中间设备？A、B、D、GA、B、E、FC、D、G、IG、H、I、J2您所在的网际网络发生了路由问题。
要鉴别此错误，应该检查以下哪种类型的设备？接入点主机集线器路由器交换机3请参见图示。
技术人员正在处理网络问题，需要验证路由器的LAN 接口。
要确认路由器接口工作正常，应该从此主机ping 哪个地址？127.0.0.1192.168.64.196192.168.254.1192.168.254.9192.168.254.2544下列哪三项陈述说明了传输层协议的特征？（选择三项）应用层协议使用TCP 端口号和UDP 端口号。
TCP 使用端口号提供可靠的IP 数据包传输。
UDP 使用窗口和确认获得可靠的数据传输。
TCP 使用窗口和定序提供可靠的数据传输。
TCP 是面向连接的协议。
UDP 是无连接协议。
5OSI 模型的哪两项功能在第2 层实现？（选择两项）物理编址编码路由布线介质访问控制6由于发生安全规规事件，必须更改路由器口令。
从以下配置项可获知什么信息？（选择两项。
）Router(config)#line vty 0 3Router(config-line)# password c13c0Router(config-line)#login这些配置项对远程访问指定了三条Telnet 线路。
这些配置项对远程访问指定了四条Telnet 线路。
这些配置项将控制台口令和Telnet 口令设置为"c13c0"。
因为Telnet 配置不完整，所以Telnet 访问将遭到拒绝。
允许使用"c13c0" 作为口令访问Telnet。
7请参见图示。
电缆1 和电缆2 的两端分别按照特定的物理层要求接线。
表中按编号列出了每个网段以及网络技术人员在该网段不同网络组件之间已经安装的电缆。
根据给定的数据回答，哪些网段的电缆安装正确？（选择三项）网段1网段2网段3网段4网段58下列哪种提示符代表适合copy running-config startup-config命令使用的模式？Switch-6J>Switch-6J#Switch-6J(config)#Switch-6J(config-if)#Switch-6J(config-line)#9请参见图示。
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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。 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
将完整的路由表更新发送给所有邻居 受 RIP 第 1 பைடு நூலகம்支持
PS:双击文字部分，ctr+A，ctrl+C，然后粘贴到word即可。 未能直接提供word版，抱歉。