ERouting Chapter 3

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 相连网或路由器接口之间相互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 以下哪条配置命令才能与Melbourne 站点建立连接？（选择三项）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。

五年级第三单元英语作文小偷逃跑的路线全文共3篇示例，供读者参考篇1The thief's escape routeAfter a successful robbery at the local bank, the thief quickly made his escape before the police could arrive. Running through the streets, the thief was determined to evade capture at all costs. But with the police hot on his heels, he needed to come up with a plan fast.Thinking quickly, the thief decided to head towards the old abandoned warehouse at the edge of town. With its maze-like layout and multiple exits, the warehouse would be the perfect place to hide and evade capture. Dodging through alleys and side streets, the thief finally reached the warehouse, quickly ducking inside before the police could spot him.Inside the warehouse, the thief navigated through the dark and dusty corridors, trying to stay one step ahead of the police. He knew that time was of the essence, and he needed to find a way out quickly. Spotting an open window at the end of ahallway, the thief made a run for it, climbing out onto a fire escape and making his way down to the street below.With the police still searching the warehouse, the thief knew he needed to keep moving. He headed towards the train station, knowing that a train ride out of town would be the perfect way to make his escape. Buying a ticket for the next train out, the thief boarded the train and settled in for the journey ahead.As the train pulled out of the station, the thief breathed a sigh of relief. He had successfully evaded capture and was now on his way to a new destination, far away from the scene of the crime. Sitting back in his seat, the thief knew that he had outsmarted the police and had managed to get away with hisill-gotten gains. But as he looked out the window at the passing scenery, he also knew that his life as a fugitive was only just beginning. The chase may have been over for now, but the thief knew that he would always be looking over his shoulder, ready to make his next move.篇2The escape route of a thiefOne sunny afternoon, a thief broke into a house in a quiet neighborhood. He carefully planned his escape route, knowingthat he needed to act quickly and efficiently to avoid getting caught. The thief, a young man in his twenties, was dressed in all black and wore a ski mask to conceal his identity.After stealing valuable items from the house, the thief quickly made his way to the back door. He knew that the front door was too risky, as it faced a busy street where someone could easily spot him. The back door led to a small alleyway, which was perfect for his escape plan. The alleyway was narrow and dark, with tall buildings towering on either side, creating a maze-like effect.As the thief ran through the alleyway, he could hear the sound of sirens in the distance. He knew that the police were on their way and he needed to act fast. He turned a corner and found himself facing a dead end. Panic set in as he frantically searched for an escape route. Suddenly, he noticed a small window high above him. Without hesitation, he climbed up a nearby drainpipe and managed to squeeze through the window, narrowly avoiding getting caught.Once inside the building, the thief found himself in a dimly lit hallway. He could hear footsteps approaching and knew that he needed to find a way out quickly. He spotted an emergency exit sign and followed it down a flight of stairs. As he reached theground floor, he saw a door leading to the back alley. Without hesitation, he burst through the door and found himself back in the maze-like alleyway.The thief quickly made his way through the alleyway, dodging obstacles and hiding in the shadows. He could hear the sound of police cars getting closer and knew that he needed to find a way to escape. Finally, he reached the end of the alleyway and found himself facing a high fence. Without hesitation, he climbed over the fence and onto the street, disappearing into the bustling city before the police could catch up to him.The thief had successfully evaded capture and made his escape, leaving the police baffled and the neighborhood on high alert. As he disappeared into the city, he knew that he had pulled off the perfect escape plan and would live to steal another day.篇3The Escape Route of a ThiefOne evening, in a small town, a thief broke into a jewelry store and stole a valuable diamond necklace. As soon as he heard the alarm, he quickly grabbed the necklace and ran out of the store. He knew he had to act fast to avoid getting caught by the police. So, he carefully planned his escape route.The thief ran through the narrow streets and alleyways, trying to get as far away from the crime scene as possible. He then headed towards the park, where he knew he could hide in the bushes and trees. As he made his way through the park, he noticed a police car patrolling the area. He decided to change his direction and ran towards the river.The thief crossed the bridge and entered the forest on the other side. He knew that the dense trees would provide him with cover, making it difficult for the police to track him down. He ran deeper into the forest, trying to put as much distance between himself and the authorities as possible.After running for what seemed like hours, the thief finally reached the edge of the forest. He saw a train station in the distance and knew that this was his ticket to freedom. He quickly boarded a train that was headed out of town and disappeared into the night.As the police searched for him far and wide, the thief sat on the train, smiling to himself. He had successfully escaped capture and was now on his way to a new city, where he could sell the stolen necklace and make a fortune.In the end, the thief's clever escape route had helped him evade the police and avoid getting caught for his crime. But littledid he know, the authorities were hot on his trail, determined to bring him to justice. The chase was far from over.。

Unit11. After months of researching Northwestern on the Web and grilling friends, teachers and advisers who had gone there, Maxine pinned her hopes on getting accepted.经过数月在网上搜索并研究NW大学和仔细询问到访过NW大学的朋友、老师和顾问，Maxine 最终希望自己能被NW大学录取。

2. For students like Maxine who are applying to college for next fall, that dream is turning out to be frustratingly unobtainable. It turns out the odds of getting into a selective college have never been worse.对于像Maxine一样正在申请秋季入学的学生来说，他们会沮丧地发现这一梦想难以实现。

考入一所名校的机会从未如此渺茫。

3. But admissions directors are already worrying about the shrinking pool of future applicants, especially the sliver of those who can afford to foot the $40,000 annual tab.---但是招生主管们已经开始担忧申请者数量缩减的问题，尤其是为数不多的每年有能力支付4万美元的那部分申请者。

4. Those who left private schools in the 1980s and 1990s can expect to earn 35% more in life than the average product of a state school, they found, around half of which can be attributed to education, not background.20世纪80年代和90年代中期的私立学校毕业生能够期望一生的收入比国立中学的普通毕业生多35%，他们发现这其中大约一半可以归因于他们所受的教育，而非背景。

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。

1When multiple routing protocols have a route to the same destination network, what determines route is installed in the routing table?best metriclowest hop countgreatest available bandwidthlowest administrative distancelowest cost2A growing medium-sized manufacturing company recently began to have routing instability issue company uses static routes and has a mixture of over 30 Cisco and non-Cisco routers. The netw administrator has decided to convert the network to dynamic routing. What characteristics of pro should be considered in this selection process?Distance vector routing protocols, such as RIP, converge more quickly than do link-state rou protocols.EIGRP can be used on all of the routers in the company.OSPF can be used between the routers.An exterior routing protocol, such as BGP, is recommended for growing companies.3An engineer creates a static route by entering the Router(config)# ip route 10.0.0.0 255.255.25 192.168.1.2 command. What can be concluded about this route?The administrative distance of this route is 1.192.168.1.2 is the address of an interface on this router.This route will display as a directly connected network in the routing table.Packets with a destination IP address of 192.168.1.2 will be forwarded to the 10.0.0.0/24 ne 4W hat is the purpose of a routing protocol?It is used to build and maintain ARP tables.It provides a method for segmenting and reassembling data packets.It allows an administrator to devise an addressing scheme for the network.It allows a router to share information about known networks with other routers.It provides a procedure for encoding and decoding data into bits for packet forwarding.5Which two conditions would create a setting where the use of a distance-vector routing protocol efficient? (Choose two.)the network requires a special hierarchical designfast convergence of the network is crucialthe network is using a hub and spoke topologythe network is using a flat designthere are more than 15 hops between the most distant routers6Which command would the network administrator issue to determine if load balancing is in effect on a router?show ip protocolsshow ip routeshow ip interface briefshow ip interface7W hich of the following best describes the operation of distance vector routing protocols?They use hop count as their only metric.They only send out updates when a new network is added.They send their routing tables to directly connected neighbors.They flood the entire network with routing updates.8Which two statements correctly describe the concepts of administrative distance and metric? (Choose two.)Administrative distance refers to the trustworthiness of a particular route.A router first installs routes with higher administrative distances.The value of the administrative distance can not be altered by the network administrator.Routes with the smallest metric to a destination indicate the best path.The metric is always determined based on hop count.The metric varies depending which Layer 3 protocol is being routed, such as IP or IPX.9T he 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.The clock rate on this serial interface is set to 129,000.The next-hop router is 129 hops away from this router.This route has been updated 129 times in this routing table.10Which of the following conditions must be met in order for a network to have converged?The routers in the network are operating with dynamic routing protocols.The routers in the network are operating with compatible versions of IOS.The routers in the network are operating with the same routing tables.The routers in the network are operating with consistent routing knowledge.11Refer to the exhibit. Router1 and Router2 are running EIGRP. All interfaces are operational and packets can be forwarde networks. What information will be found in the routing table for Router1?Router1 will have 6 directly connected networks.The administrative distance of the route to network 172.16.0.0 will be 90.The metric for routes to 172.16.0.0 will be 1.The interface that is used to forward packets to 172.16.0.0 will always be the S0/1 interface.12W hich two statements are true regarding the advantages of the use of static routes? (Choose two).increased securityreduced effort in configuring routesthe administrator maintains control over routingeasier to implement in a growing networkreduces the chance of routing errorsincreased router resource usage13The 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?A packet destined for host 192.168.252.2 will be forwarded out the interface connected to network 209.165.201.0/24The value, 120, is used to determine the best path when a router has more than one routing protocol configured for t destination network.This route was manually configured using the ip route command.192.168.252.2 is an interface on the router that produced this output.14W hat 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 shutdownThe 172.16.3.0 network will be routed by any dynamic routing protocol automatically.A routing table entry is made to the 172.16.3.0 network with a code of "C".A static route is required to route traffic to the 172.16.3.0 network.The commands will be saved to the startup-configuration automatically.15Which two statements are true regarding classless routing protocols? (Choose two.)sends subnet mask information in routing updatessends complete routing table update to all neighborsis supported by RIP version 1allows for use of both 192.168.1.0/30 and 192.168.1.16/28 subnets in the same topologyreduces the amount of address space available in an organization16Which two statements are true regarding metrics? (Choose two.)RIP uses bandwidth as a metric.OSPF uses delay as a metric.EIGRP uses bandwidth as a metric.OSPF uses cost based on bandwidth as a metric.RIP uses delay as a metric.EIGRP uses hop count only as a metric.17W hy is fast convergence desirable in networks that use dynamic routing protocols?Routers will not allow packets to be forwarded until the network has converged.Hosts are unable to access their gateway until the network has 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.18Refer to the exhibit. Which statement correctly describes how R1 will determine the best path to R2?R1 will install a RIP route using network A in its routing table because the administrative distance of RIP is higher thaR1 will install a RIP route using network A in its routing table because the path cost from RIP is lower than EIGRP.R1 will install an EIGRP route using network B in its routing table because the administrative distance of EIGRP is loR1 will install an EIGRP route using network B in its routing table because the path cost from EIGRP is lower than RR1 will install an EIGRP route and a RIP route in its routing table and load balance between them.19Refer 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?345662472420 A router learns two paths with equal metrics to a destination network via the RIP routing protocol. How will the router handlthe destination network?The router will install the first route it learned into the routing table.The router will install both routes in the routing table and load balance between the two.The router will put the first route in the routing table, and denote the second route as a backup route.The router will pick the path with the higher bandwidth and will place it in the routing table.。

贸易争端将迎来2008贸易政策的前景，今年的严峻，虽然齐心协力，被许多商人在方法上的改变可能阻止倒退到贸易保护主义。

在美国，经济恶化的消息再加上即将举行的选举保证慢，如果有的话，在世界范围内减少贸易壁垒，增加对美国公司的市场准入进度。

在世界各地，这些底片是由恐惧不断扩大中国的出口，缺乏在世界贸易组织（WTO ）多哈谈判的政治意愿，并不愿意在没有总统的快速的贸易伙伴作出让步到美国的强化跟踪谈判授权（又名贸易促进权）。

会有因经济和政治气候和缺乏在多哈谈判取得突破的紧张局势今年。

将会有关于所采取的行动（而不是取），因为这紧张的结果分歧。

现在的问题是，他们将如何将这些分歧进行管理，以及是否导致贸易纠纷。

默认选项是在纠纷显著增加，随着美国和其贸易伙伴的焦点会导致保护主义和歧视性政策。

大多数人会从长远来看，如果失去这种情况发生。

现在的挑战是分析多边贸易体系将面临和发展战略，以限制所产生的危害，并作为垫脚石恢复进度，当全球经济和政治气候改善的困难。

从历史上看，贸易自由化努力取得成功的只有在一个健康的全球经济气候（在乌拉圭回合谈判在1990年代初建立世界贸易组织）或经济大灾难后（总协定关税与贸易，或关贸总协定，二战结束后）。

在这种时候，政府和企业专注于必要的讨价还价，以实现更大的全球自由化。

给人以这一概念得到- 的减少你的一些贸易壁垒来保护别人的减少更感兴趣的领域，你，确认和采取行动。

那些失去保护不喜欢它，但亲自由化的力量是强大的。

相反，在有问题的经济气候，怕给人占主导地位。

政客听到更多来自选民谴责收入进口（现在全球化）和就业的不利影响比他们从那些寻求给予或接受扩大市场准入做。

在美国，这种转变是明显的在2006年的国会选举。

它每天都变得更加明显，因为经济成长放缓的迹象。

两党努力制定一个一揽子计划是值得欢迎的，但他们是极不可能提高贸易政策的画面。

与此同时，对于有利于贸易的国会多数的前景是零，而且，虽然许多美国总统候选人的保护主义论调是只是说说而已，对于一个贸易型的管理，前景是不确定的，最好的。

第七章 CCNA第二学期 Exploration: 路由协议和概念 (版本 4.0)(2010-12-20 19:19:52)转载▼标签：it 分类：2010｜CCNA2官方试题--路由ERouting Chapter 7 - CCNA Exploration: 路由协议和概念(版本 4.0)1请参见图示。

如果所有路由器都运行 RIP 第 2 版，为什么没有 192.168.1.32/27网络的路由Rip 第 2 版不会在更新中发送子网掩码。

路由器 A 并未将 RIP 设置为路由协议。

Rip 第 2 版默认将自动总结路由。

路由器 B 未设置为通告 192.168.1.64/30 网络。

2请参见图示。

下列哪个路由器上的哪条命令可让 Router1 获知 192.168.0.0/20 网络？Router1(config)# ip classlessRouter1(config-router)# no passive-interface serial 0/1/1Router2(config-router)# version 2Router2(config-router)# neighbor 10.0.0.23哪两项是选择实施 RIP 第 2 版而不是 RIP 第 1 版的原因？（选择两项。

）RIP 第 2 版支持 VLSM。

RIP 第 2 版支持 16 台以上的路由器。

RIP 第 2 版支持有类（而不是无类）路由RIP 第 2 版支持路由更新验证。

RIP 第 2 版支持多区域。

RIP 第 2 版使用 Dijkstra 算法而不是贝尔曼-福特算法。

4RIP v1 和 RIP v2 的相似点有哪些？（选择三项。

）两者都使用跳数作为度量。

两者对无穷距离使用相同的度量值。

两者都向邻居广播其更新。

两者都在更新中发送子网掩码信息。

两者都对更新来源进行身份验证。

两者都使用水平分割来防止路由环路。

5请参见图示。

路由器 East 和 West 被配置为使用 RIPv1。

参加考试- ERouting Chapter 11 - ${COURSENAME} (版本${VERSION})01:52:11剩余时间:1请参见图示。

“O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0”一行中的“O*E2”代表什么含义？内部第 2 类OSPF 路由。

距离至少两跳远的外部OSPF 路由。

来自两个不同源的外部OSPF 路由。

不会增加开销的外部OSPF 路由。

默认路由。

该路由是从第 2 类路由器分布到OSPF 的。

2请参见图示。

路由器 A 已针对OSPF 进行了正确的配置。

要生成如图所示路由表，需要在路由器 B 上输入哪条或哪组O 句？B(config-router)# network 192.168.1.0 0.0.0.3 area 0B(config-router)# network 10.16.1.0 0.0.0.224 area 0B(config-router)# network 10.16.1.0 255.255.255.224 area 0B(config-router)# network 192.168.1.0 255.255.255.255 area 0B(config-router)# network 10.0.0.0 255.255.255.255 area 03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4请参见图示。

到10.0.0.0 网络的路由的开销是多少？211017861.5445OSPF 使用什么来计算到目的网络的开销？带宽带宽和跳数带宽和可靠性带宽、负载和可靠性6包含五台路由器的完全收敛OSPF 网络已经正常运行数个星期。

所有配置都已保存，而且未使用任何静态路由。

如果其中一并重新启动，那么在配置文件加载之后、OSPF 收敛之前其路由表中包含什么信息？路由表中包含整个网络的所有路由。

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。