CCNA题库翻译版
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Cisco 640-802
Cisco Certified Network Associate (CCNA)
Q&A V 14 (252Q&A)
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1. What are two reasons that a network administrator would use access lists? (Choose two.)
1.出于哪两种理由，网络管理员会使用访问列表？
A. to control vty access into a router
A.控制通过VTY访问路由器
B. to control broadcast traffic through a router
B.控制广播流量穿越路由器
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C. to filter traffic as it passes through a router
C.过滤穿越路由器的流量
D. to filter traffic that originates from the router
过滤源自路由器的流量
E. to replace passwords as a line of defense against security incursions
用来重置密码以防御攻击
Answer: AC
2. A default Frame Relay WAN is classified as what type of physical network?
2.一个默认的帧中继
WAN被分类为哪种物理网络类型？
A. point-to-point
A.点到点
B. broadcast multi-access
B.广播多路访问
C. nonbroadcast multi-access
C.非广播多路访问
D. nonbroadcast multipoint
D.非广播多点
E. broadcast point-to-multipoint
E.广播点到多点
Answer: C
3. A single 802.11g access point has been configured and installed in the center of a square office.
A few wireless users are experiencing slow performance and drops while most users are operating
at peak efficiency. What are three likely causes of this problem? (Choose three.)
3.一个802.11接入点被部署在一个方形办公室的中央，当大多数用户在大流量传输数据时，
一些无线用户发现无线网络变得缓慢和出现丢包
A. mismatched TKIP encryption
B. null SSID
C. cordless phones
D. mismatched SSID
E. metal file cabinets
F. antenna type or direction
Answer: CEF
4. Refer to the exhibit. How many broadcast domains exist in the exhibited topology?
根据下图，图中的拓扑中存在多少个广播域？
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A. one
A.1
B. two
B.2
C. three
C.3
D. four
D.4
E. five
E.5
F. six
F.6
Answer: C
5. Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose
two.)
5.根据下图，WLAN diagram决定了哪两个事实
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A. The area of overlap of the two cells represents a basic service set (BSS).
A. 两个 cells的overlap的区域描述了一个basic service set
B. The network diagram represents an extended service set (ESS).
B. 网络描述了一个extended service set
C. Access points in each cell must be configured to use channel 1.
C. 再每个CELL中的AP必须被配置成使用channel 1
D. The area of overlap must be less than 10% of the area to ensure connectivity.
D.为了确保连通性,重叠区域必须小于10%
E. The two APs should be configured to operate on different channels.
E. 两个访问点应该被配置成工作在不同的频道
Answer: BE
6. The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router.
Which of the following statements is true concerning this command?
6.路由器上输入命令frame-relay map ip 10.121.16.8 102 broadcast，以下选项正确的是？
A. This command should be executed from the global configuration mode.
A.该命令应该在全局配置模式下被执行
B. The IP address 10.121.16.8 is the local router port used to forward data.
B.IP地址10.121.16.8是本地路由器用来转发数据的接口
C. 102 is the remote DLCI that will receive the information.
C.102是远端的 DLCI它将接受信息。
D. This command is required for all Frame Relay configurations.
D.这个命令要求被配置为所有的帧中继配置。
E. The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC.
E.这个广播选项允许数据包，例如rip更新信息，将会被转发通过 PVC.
Answer: E
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7. Which type of attack is characterized by a flood of packets that are requesting a TCP connection
to a server?
7.哪种类型的攻击的特点是发大量的
TCP请求连接数据包到服务器？
A. denial of service
A.拒绝服务
B. brute force
B.强制叠加
C. reconnaissance
C.监听
D. Trojan horse
D.木马
Answer: A
8. Which of the following are associated with the application layer of the OSI model? (Choose
two.)
8.以下两个选项是工作在
OSI模型的应用层的？
A. ping
B. Telnet
C. FTP
D. TCP
E. IP
Answer: BC
9. Refer to the exhibit. The network administrator has created a new VLAN on Switch1 and added
host C and host D. The administrator has properly configured switch interfaces FastEthernet0/13
through FastEthernet0/24 to be members of the new VLAN. However, after the network
administrator completed the configuration, host A could communicate with host B, but host A
could not communicate with host C or host D. Which commands are required to resolve this
problem?
9.网络管理员在交换机
1上创建一个新
VLAN并且将主机
C和主机D加入到此VLAN中.管理员
配置交换机接口FastEther
net0/13到FastEthernet0/24成为新VLAN成员.但是网络管理员完成
配置以后,主机A可以和主机B通信,但是主机
A不能和主机C或者主机D通信.
哪个命令可以用来解决这个问题
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A. Router(config)# interface fastethernet 0/1.3
Router(config-if)# encapsulation dot1q 3
Router(config-if)# ip address 192.168.3.1 255.255.255.0
B. Router(config)# router rip
Router(config-router)# network 192.168.1.0
Router(config-router)# network 192.168.2.0
Router(config-router)# network 192.168.3.0
C. Switch1# vlan database
Switch1(vlan)# vtp v2-mode
Switch1(vlan)# vtp domain cisco
Switch1(vlan)# vtp server
D. Switch1(config)# interface fastethernet 0/1
Switch1(config-if)# switchport mode trunk
Switch1(config-if)# switchport trunk encapsulation isl
Answer: A
10. For security reasons, the network administrator needs to prevent pings into the corporate
networks from hosts outside the internetwork. Which protocol should be blocked with access
control lists?
10.出于安全考虑，网络管理员需要去防止外网主机
PING内网，下面那个协议应该用
access
control lists 限制掉
A. IP
B. ICMP
C. TCP
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D. UDP
Answer: B
11. What are two recommended ways of protecting network device configuration files from
outside network security threats? (Choose two.)
11.哪两种方法被推荐用来保守网络设备的配置文件不受外网的威胁
A. Allow unrestricted access to the console or VTY ports.
A.允许unrestricted 访问到console或VTY口
B. Use a firewall to restrict access from the outside to the network devices.
B.用防火墙去限制外网的网络设备访问
C. Always use Telnet to access the device command line because its data is automatically
encrypted.
C.因为数据被自动加密，所以总是允许使用
TELNET命令访问网络设备的命令行，
D. Use SSH or another encrypted and authenticated transport to access device configurations.
D.使用SSH或其他加密、认证机制去访问设备的配置
E. Prevent the loss of passwords by disabling password encryption.
E.为了避免丢失密码，所以不对密码进行加密（明文）
Answer: BD
12. Refer to the exhibit. The access list has been configured on the S0/0 interface of router RTB in
the outbound direction. Which two packets, if routed to the interface, will be denied? (Choose
two.)
12.根据下图，该
access list被配置在路由器RTB的S0/0接口上的OUT方向，哪两个数据包会
被DENY，如果被路由到该接口上的话？
access-list 101 deny tcp 192.168.15.32 0.0.0.15 any eq telnet
access-list 101 permit ip any any
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A. source ip address: 192.168.15
.5; destination port: 21
B. source ip address:, 192.168.15.37 destination port: 21
C. source ip address:, 192.168.15.41 destination port: 21
D. source ip address:, 192.168.15.36 destination port: 23
E. source ip address: 192.168.15.46; destination port: 23
F. source ip address:, 192.168.15.49 destination port: 23
Answer: DE
13. What are two security appliances that can be installed in a network? (Choose two.)
13.以下哪两个安全工具能被安装在一个网络里
A. ATM
B. IDS
C. IOS
D. IOX
E. IPS
F. SDM
Answer: BE
14. Refer to the exhibit. Switch1 has just been restarted and has passed the POST routine. Host A
sends its initial frame to Host C. What is the first thing the switch will do as regards populating the
switching table?
14.根据下图，
Switch1刚刚完成重启，并完成上电自检。
Host A发送它的第一个侦到Host C ，
交换机首先会对switching table做什么操作
A. Switch1 will add 192.168.23.4 to the switching table.
A. Switch1会添加192.168.23.4 到switching table.
B. Switch1 will add 192.168.23.12 to the switching table.
B.Switch1添加192.168.23.12到switching table.
C. Switch1 will add 000A.8A47.E612 to the switching table.
C. Switch1添加 000A.8A47.E612到 switching table.
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D. Switch1 will add 000B.DB95.2EE9 to the switching table.
D.Switch1添加000B.DB95.2EE9到 switching table.
Answer: C
15. The user of Host1 wants to ping the DSL modem/router at 192.168.1.254. Based on the Host1
ARP table that is shown in the exhibit, what will Host1 do?
15.Host1的用户想
PING DSL调制解调器/路由器的
192.168.1.254，ARP表如下图，Host1会
怎么操作？
A. send a unicast ARP packet to the DSL modem/router
A.发送一个单播ARP包到DSL调制解调器
/路由器
B. send unicast ICMP packets to the DSL modem/router
B.发送一个单播
ICMP包到DSL调制解调器
/路由器
C. send Layer 3 broadcast packets to which the DSL modem/router responds
C.发送三层广播包到响应的
DSL调制解调器
/路由器
D. send a Layer 2 broadcast that is received by Host2, the switch, and the DSL modem/router
D.发送一个可以被Host2, the switch, and the DSL modem/router 受到的2层广播帧
Answer: B
16. Refer to the exhibit. What is the most efficient summarization that R1 can use to advertise its
networks to R2?
16.根据下图，
R1能通告给
R2的最有效的汇总是？
A. 172.1.0.0/22
B. 172.1.0.0/21
C. 172.1.4.0/22
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D. 172.1.4.0/24
172.1.5.0/24
172.1.6.0/24
172.1.7.0/24
E. 172.1.4.0/25
172.1.4.128/25
172.1.5.0/24
172.1.6.0/24
172.1.7.0/24
Answer: C
17. Which spread spectrum technology does the 802.11b standard define for operation?
17.哪种扩频技术是
802.
11B定义使用的
A. IR
B. DSSS
C. FHSS
D. DSSS and FHSS
E. IR, FHSS, and DSSS
Answer: B
18. Refer to the exhibit. Assume that all router interfaces are operational and correctly configured.
In addition, assume that OSPF has been correctly configured on router R2. How will the default
route configured on R1 affect the operation of R2?
18.根据下图，假设所有路由器接口都配置正确且正常工作，假设
R2上OSPF配置正确，配置
在R1上默认路由会怎么影响
R2的工作
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A. Any packet destined for a network that is not directly connected to router R1 will be dropped.
A.任何到达一个和路由器R1非直连的网络的数据包都会被丢弃
B. Any packet destined for a network that is not directly connected to router R2 will be dropped
immediately.
B.任何到达一个和路由器 R2非直连的网络的数据包都会被丢弃
C. Any packet destined for a network that is not directly connected to router R2 will be dropped
immediately because of the lack of a gateway on R1.
C.任何到达一个和路由器 R2非直连的网络的数据包都会即时被丢弃，因为 R1上缺少网关
D. The networks directly connected to router R2 will not be able to communicate with the
172.16.100.0, 172.16.100.128, and 172.16.100.64 subnetworks.
D. 直连在 R2上的网络将不能够和 172.16.100.0, 172.16.100.128, 172.16.100.64这些子网通
讯
E. Any packet destined for a network that is not referenced in the routing table of router R2 will be
directed to R1. R1 will then send that packet back to R2 and a routing loop will occur.
E.任何目的地没有在R2的路由表中的数据包,R2将会定向到R1,R1会发送哪个数据包到R2,这样路
由环路产生
Answer: E
19. A network interface port has collision detection and carrier sensing enabled on a shared
twisted pair network. From this statement, what is known about the network interface port?
19.在一个共享的双绞线的网络上的接口上产生了冲突检测和载波侦听 .通过这个描述 ,关于
这个网络接口你知道了什么
A. This is a 10 Mb/s switch port.
A.这是一个10 Mb/s的交换端口
B. This is a 100 Mb/s switch port.
B.这是一个100Mb/s的交换端口
C. This is an Ethernet port operating at half duplex.
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source address for the packets forwarded by the router to the destination server?
20.根据下图显示的拓扑结构和路由器配置，一个在该LAN上的主机正在通过INTERNET访
问一个FTP 服务器。下列地址中哪个可以作为路由器发送到该目的服务器的数据包的源地
址。
A. 10.10.0.1
B. 10.10.0.2
C. 199.99.9.33
source address for the packets forwarded by the router to the destination server?
20.根据下图显示的拓扑结构和路由器配置，一个在该LAN上的主机正
在通过INTERNET访
问一个FTP 服务器。下列地址中哪个可以作为路由器发送到该目的服务器的数据包的源地
址。
A. 10.10.0.1
B. 10.10.0.2
C. 199.99.9.33
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C.这是一个工作在半双工模式下的以太口
D. This is an Ethernet port operating at full duplex.
D.这是一个工作在全双工模式下的以太口
E. This is a port on a network interface card in a PC.
E.这是一个PC机上网卡上的一个接口
Answer: C
20. Refer to the topology and router configuration shown in the graphic. A host on the LAN is
accessing an FTP server across the Internet. Which of the following addresses could appear as a
D. 199.99.9.57
E. 200.2.2.17
F. 200.2.2.18
Answer: D
21. A company is installing IP phones. The phones and office computers connect to the same
device. To ensure maximum throughput for the phone data, the company needs to make sure that
the phone traffic is on a different network from that of the office computer data traffic. What is the
best network device to which to directly connect the phones and computers, and what technology
should be implemented on this device? (Choose two.)
21.一个公司正在安装
IP 电话。电话和办公室电脑连接到同个设备上，为了保证电话数据的
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最大传输量，公司需要确定电话流量是和办公室电脑的数据流量不是在同一个网络上。以下
哪个是最好的网络设备，用来直连到电话和电脑，并且，哪种技术应该被配置在该设备上
A. hub
B. router
C. switch
D. STP
E. subinterfaces
F. VLAN
Answer: CF
22. Refer to the exhibit. Which statement describes DLCI 17?
22.根据下图，那个选项描述了
DLCI 17
A. DLCI 17 describes the ISDN circuit between R2 and R3.
A.DLCI 17描述了
R2和R3之间的ISDN线路
B. DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
B.DLCI 17描述了一条在
R2上的PVC，不能用在R3和R1上
C. DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
C.DLCI 17 是R2使用的二层地址，用来描述一条到
R3的PVC
D. DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.
D.DlDLCI17描述了一条从R2 R3到服务提供商拨号网络
Answer: C
23. Which routing protocol by default uses bandwidth and delay as metrics?
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23.哪个路由协议默认用带宽和延迟作为
metrics值
A. RIP
B. BGP
C. OSPF
D. EIGRP
Answer: D
24. Refer to the output from the show running-config command in the exhibit. What should the
administrator do to allow the workstations connected to the FastEthernet 0/0 interface to obtain an
IP address?
24.根据下图中展示的
show running-co
nfig命令的结果。网络管理员该如何做才能允许工作站
连接到FastEthernet 0/0接口去获得一个
IP 地址
A. Apply access-group 14 to interface FastEthernet 0/0.
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A.在接口FastEthernet 0/0应用access-group 14
B. Add access-list 14 permit any any to the access list configuration.
B.在access-list 14中添加access-list 14 permit any any
C. Configure the IP address of the FastEtherent 0/0 interface to. 10.90.201.1
C.配置FastEtherent 0/0接口的
IP地址为
10.90.201.1
D. Add an interface description to the FastEthernet 0/0 interface configuration.
D.为接口FastEthernet 0/0添加一个接口描述
Answer: C
25. Refer to the exhibit. The networks connected to router R2 have been summarized as a
192.168.176.0/21 route and sent to R1. Which two packet destination addresses will R1 forward to
R2? (Choose two.)
25.根据下图，网络连接到路由器
R2被汇总为一条192.168.176.0/21的路由，并发给
R1。哪两
个数据包目的地址R1会转发给
R2
A. 192.168.194.160
B. 192.168.183.41
C. 192.168.159.2
D. 192.168.183.255
E. 192.168.179.4
F. 192.168.184.45
Answer: BE
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26. Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in
the exhibit, but there is no data connectivity between them. The Atlanta router is known to have a
correct configuration. Given the partial configurations shown in the exhibit, what is the problem
on the Brevard router that is causing the lack of connectivity?
26.如下图，两个路由器（
Atlanta 和 Brevard）用串口连接起来。但是他们之间没有数据传
输，已知Atlanta配置正确，下图给出部分配置，路由器
Brevard上导致该问题的原因是
A. A loopback is not set.
A.没有设置loopback命令
B. The IP address is incorrect.
B.IP地址不正确
C. The subnet mask is incorrect.
C.子网掩码不正确
D. The serial line encapsulations are incompatible.
D.串行链路封装不正确
E. The maximum transmission unit (MTU) size is too large.
E.最大传输单元（MTU）设置得太大
F. The bandwidth setting is incompatible with the connected interface.
F.带宽设置和直连的接口不匹配
Answer: B
27. Refer to the exhibit. Which switch provides the spanning-tree designated port role for the
network segment that services the printers?
27.根据下图，哪个交换机为打印机提供了生成树中的指定端口角色？
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A. Switch1
B. Switch2
C. Switch3
D. Switch4
Answer: C
28. Refer to the exhibit. Switch-1 needs to send data to a host with a MAC address of
00b0.d056.efa4. What will do with this data?
28.根据下图
，
Switch-1需要往一台
MAC地址为00b0.d056.efa4的主机发数据，
Switch-1会如何
处理这些数据？
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A. Switch-1 will drop the data because it does not have an entry for that MAC address.
A. Switch-1会丢弃该数据，因为它没有该
MAC地址条目
B. Switch-1 will flood the data out all of its ports except the port from which the data originated.
B.Switch-1会防洪该数据到所有的接口，除了该数据的源接口
C. Switch-1 will send an ARP request out all its ports except the port from which the data
originated.
C.Switch-1会发送
ARP请求到所有的接口，除了该数据的源接口
D. Switch-1 will forward the data to its default gateway.
D.Switch-1会往默认网关发送该数据
Answer: B
29. In the implementation of VLSM techniques on a network using a single Class C IP address,
which subnet mask is the most efficient for point-to-point serial links?
29.在使用VLSM技术的网络中使用一个C类的IP地址，以下哪个子网掩码在点对点串行链路
中是最不浪费地址空间的？
A. 255.255.255.0
B. 255.255.255.240
C. 255.255.255.248
D. 255.255.255.252
E. 255.255.255.254
Answer: D
30. Refer to the exhibit. Why would the network administrator configure RA in this manner?
30.根据下图，网络管理员如此配置的
RA的原因是？
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A. to give students access to the Internet
A.让students访问Internet
B. to prevent students from accessing the command prompt of RA
B.阻止students访问RA的命令提示符
C. to prevent administrators from accessing the console of RA
C.阻止管理员访问
RA的控制台
D. to give administrators access to the Internet
D.让administrators访问Internet
E. to prevent students from accessing the Internet
E.阻止students访问Internet
F. to prevent students from accessing the network
F.阻止students 访问Admin的网络
Answer: B
31. Which two values are used by Spanning Tree Protocol to elect a root bridge? (Choose two.)
31.那两个值被生成树协议用来选举根桥
A. amount of RAM
B. bridge priority
C. IOS version
D. IP address
E. MAC address
F. speed of the links
Answer: BE
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32. Refer to the exhibit. The two exhibited devices are the only Cisco devices on the network. The
serial network between the two devices has a mask of 255.255.255.252. Given the output that is
shown, what three statements are true of these devices? (Choose three.)
32.根据下图，图中两个设备是网络中仅有的
CISCO设备，两个设备间的串行链路的掩码是
255.255.255.252,在下面的答案中，哪三个是正确的？
A. The Manchester serial addres
s is 10.1.1.1.
A.Manchester的串行链路的地址为10.1.1.1
B. The Manchester serial address is 10.1.1.2.
B.Manchester的串行链路的地址为10.1.1.2
C. The London router is a Cisco 2610.
C.London路由器是
CISCO 2610
D. The Manchester router is a Cisco 2610.
D.London路由器是
CISCO 2610
E. The CDP information was received on port Serial0/0 of the Manchester router.
E.路由器Manchester 的Serial0/0端口收到
CDP信息
F. The CDP information was sent by port Serial0/0 of the London router.
F.路由器London的Serial0/0端口收到CDP信息
Answer: ACE
33. While troubleshooting a network connectivity problem, a technician observes steady link
lights on both the workstation NIC and the switch port to which the workstation is connected.
However, when the ping command is issued from the workstation, the output message "Request
timed out." is displayed. At which layer of the OSI model does the problem most likely exist?
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33.在进行网络连接排错的时候 ,一种技术员注意到工作站网卡和交换机连接工作站的接口的灯
常亮.当在工作站使用 PING命令的时候,出现的信息是 "Request timed out"那OSI最有可能存在问
题
A. the session layer
A.会话层
B. the protocol layer
B.协议层
C. the data link layer
C.数据链路层
D. the access layer
D.访问层
E. the network layer
E.网络层
F. the application layer
F.应用层
Answer: E
34. A network administrator has configured two switches, named London and Madrid, to use VTP.
However, the switches are not sharing VTP messages. Given the command output shown in the
graphic, why are these switches not sharing VTP messages?
34.一个网络管理员配置了两台交换机 London和Madrid，让它们使用 VTP。但是，两台交换
机之间没有共享VTP信息，根据下图，回答交换机之间没有分享 VTP信息的原因
A. The VTP version is not correctly configured.
A.VTP版本配置错误
B. The VTP operating mode is not correctly configured.
B.VTP工作模式配置错误
C. The VTP domain name is not correctly configured.
C.VTP域名配置错误
D. VTP pruning mode is disabled.
D.VTP的pruning mode 被禁止了
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E. VTP V2 mode is disabled.
E.VTP的V2 mode 被禁止了
F. VTP traps generation is disabled.
F.VTP traps generation 被禁止了
Answer: C
35. In order to allow the establishment of a Telnet session with a router, which set of commands
must be configured?
35.为了允许建立一个
TELNET会话，以下那个命令集必须被配置？
A. router(config)# line console 0
router(config-line)# enable password cisco
B. router(config)# line console 0
router(config-line)# enable secret cisco
router(config-line)# logi
n
C. router(config)# line console 0
router(config-line)# password cisco router(config-line)# login
D. router(config)# line vty 0
router(config-line)# enable password cisco
E. router(config)# line vty 0
router(config-line)# enable secret cisco
router(config-line)# login
F. router(config)# line vty 0
router(config-line)# password cisco
router(config-line)# login
Answer: F
36. Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of
the following are true? (Choose two.)
36.Host 1正在试图和
Host 2 联系。 Router C 的 e0接口是down的，以下选项正确的是？
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A. Router C will use ICMP to inform Host 1 that Host 2 cannot be reached.
A.Router C会使用
ICMP通知Host 1 “Host 2无法到达”
B. Router C will use ICMP to inform Router B that Host 2 cannot be reached.
B.Router C会使用
ICMP通知Host 1 “Host 2无法到达”
C. Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be
reached.
C.Router C会使用
ICMP通知Host 1 ，Router A和 Router B “Host 2无法到达”
D. Router C will send a Destination Unreachable message type.
D.Router C 会发送一个“Destination Unreachable”的消息类型
E. Router C will send a Router Selection message type.
E.Router C 会发送一个“Router Selection”的消息类型
F. Router C will send a Source Quench message type.
F.Router C 会发送一个“Source Quench”的消息类型
Answer: AD
37. Refer to the exhibit. Assuming that the router is configured with the default settings, what type
of router interface is this?
37.根据下图，假设路由器已经配置了默认配置，那么这个接口是：
A. Ethernet
B. FastEthernet
C. Gigabit Ethernet
D. asynchronous serial
E. synchronous serial
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Answer: B
38. On point-to-point networks, OSPF hello packets are addressed to which address?
38.在
OSPF点到点链路中，Hello包是发往以下那个地址？
A. 127.0.0.1
B. 172.16.0.1
C. 192.168.0.5
D. 223.0.0.1
E. 224.0.0.5
F. 254.255.255.255
Answer: E
39. While troubleshooting a connectivity problem, a network administrator notices that a port
status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition
could this indicate?
39.一位网络管理员在进行链路连通性检查时，发现
Cisco Catalyst系列交换机上的
LED灯，
在绿色和琥珀色之间不停变化。以上现象是因为（）
A. The port is experiencing errors.
A. 这个端口存在问题
B. The port is administratively disabled.
B. 这个端口被管理性的禁止。
C. The port is blocked by spanning tree.
C. 这个端口被生成树协议阻塞
D. The port has an activ
e link with normal traffic activity.
D. 这个端口的活动链路上有流量。
Answer: A
40. Refer to the exhibit. The network shown in the exhibit is running the RIPv2 routing protocol.
The network has converged, and the routers in this network are functioning properly. The
FastEthernet0/0 interface on R1 goes down. In which two ways will the routers in this network
respond to this change? (Choose two.)
40.图中所示网络运行
RIPV2路由选择协议，全网收敛并且所有的路由器运行正常。现在
R1
的
FastEthernet0/0端口，不能正常工作了，则网段内的路由器会作出怎样的回应？
A. All routers will reference their topology database to determine if any backup routes to the
192.168.1.0 network are known.
A.所有的路由器会参照自己的拓扑数据库，看它们是否有到192.168.1.0的备份路由。
B. Routers R2 and R3 mark the route as inaccessible and will not accept any further routing
updates from R1 until their hold-down timers expire.
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B.R2和R3会标记到
192.168.1.0的路由为不可用，并且不会从
R1接受更新直到它们的抑制定
时器超时
C. Because of the split-horizon rule, router R2 will be prevented from sending erroneous
information to R1 about connectivity to the 192.168.1.0 network.
C.由于水平分割原则，
R2不会向R1发送关于去往
192.168.1.0网段的错误信息
D. When router R2 learns from R1 that the link to the 192.168.1.0 network has been lost, R2 will
respond by sending a route back to R1 with an infinite metric to the 192.168.1.0 network.
D. 当R2从R1那里学到
192.168.1.0网段不可达时，
R2把去往192.168.1.0网段的度量值设置为
无限大，并向R1发送回应消息。
E. R1 will send LSAs to R2 and R3 informing them of this change, and then all
routers will send periodic updates at an increased rate until the network again
converges.
E. R1将会发送
LSA给R2和R3通知它们网络的变化情况，然后所有的路由器周期性的递增的
发送更新直到网络收敛。
Answer: CD
41. What is the maximum data rate specified for IEEE 802.11b WLANs?
41.在IEEE 802.11b无线局域网规范中，指定的最高数据速率是
?
A. 10 Mbps
B. 11 Mbps
C. 54 Mbps
D. 100 Mbps
Answer: B
42. Which of the following describe the process identifier that is used to run OSPF on a router?
(Choose two.)
42.下列哪一项正确描述了运行的
OSPF的路由器的进程标识符的作用? (Choose two.)
A. It is locally significant.
A. 是一个本地的标识
B. It is globally significant.
B. 是一个全局的标识
.
C. It is needed to identify a unique instance of an OSPF database.
C. 为了标识OSPF数据库中的唯一的实例
D. It is an optional parameter required only if multiple OSPF processes are running on the
router.
D. 是一个可选的参数，只有多个OSPF进程在同一个路由器上运行时才需要
E. All routers in the same OSPF area must have the same process ID if they are to exchange
routing information.
E. 所有在同一个
OSPF区域的路由器必须用同一个进程号，否则它们无法交换路由信息。
Answer: AC
43.Refer to the exhibit. The FMJ manufacturing company is concerned about unauthorized access
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to the Payroll Server. The Accounting1, CEO, Mgr1, and Mgr2 workstations should be the only
computers with access to the Payroll Server. What two technologies should be implemented to
help prevent unauthorized access to the server?
(Choose two.)
43.由图所示
FMJ公司注意到有未授权的访问服务器的现象，但是只有
Accounting1, CEO,
Mgr1, Mgr2，是允许访问
Payroll Server的，以下哪两种技术可以避免对服务器的未授权的
访问？
A. access lists
A.访问控制列表
B. encrypted router passwords
B．加密路由器密码
C. STP
C．生成树
D. VLANs
D．虚拟局域网
E. VTP
E．VTP
F. wireless LANs
F.无线局域网
Answer: AD
44. Which two statements are true about the command ip route 172.16.3.0 255.255.255.0
192.168.2.4? (Choose two.)
44.下列那两个选项是对命令
ip route 172.16.3.0 255.255.255.0 192.168.2.4的正确解释?
(Choose two.)
A. It establishes a static route to the 172.16.3.0 network.
A.它宣告了通往172.16.3.0的静态路由
B. It establishes a static route to the 192.168.2.0 network.
B.它宣告了通往
192.168.2.0的静态路由
C. It configures the router to send any traffic for an unknown destination to the
172.16.3.0 network.
C.配置路由器把所有未知
ip地址的流量都转发到
172.16.3.0
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D. It configures the router to send any traffic for an unknown destination out the
interface with the address
D. 配置路由器把所有未知ip地址的流量从
ip地址是192.168.2.4的接口转发出去。
E. It uses the default administrative distance.
E. 这条命令使用默认的管理距离
F. It is a route that would be used last if other routes to the same destination exist.
F.如果存在多条路有到同一个目的地，那么这条路由在最后才使用。
192.168.2.4.
Answer: AE
45. Which type of attack is characterized by a flood of packets that are requesting a
TCP connection to a server?
45.哪种类型的攻击其特点是向要求
TCP连接到服务器洪泛大量数据包？
A. 拒绝服务
B. 暴力攻击
C. 侦听
D.特洛伊木马
Answer: A
46. The network shown in the diagram is experiencing connectivity problems. Which of the
following will correct the problems? (Choose two.)
46.图示的网络在连通
性上存在问题，下列哪种做法能解决此问题？（
two）
A. Configure the gateway on Host A as 10.1.1.1.
A. 配置主机A的网关地址为10.1.1.1.
B. Configure the gateway on Host B as 10.1.2.254.
B. 配置主机B的网关地址为10.1.2.254.
C. Configure the IP address of Host A as 10.1.2.2.
C. 配置主机A的IP地址为10.1.2.2.
D. Configure the IP address of Host B as 10.1.2.2.
D. 配置主机B的IP地址为10.1.2.2.
E. Configure the masks on both hosts to be 255.255.255.224.
E. 给所有主机配置子网掩码
255.255.255.224.
F. Configure the masks on both hosts to be 255.255.255.240.
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F. 给所有主机配置子网掩码255.255.255.240.
Answer: BD
47. Which three statements are correct about RIP version 2? (Choose three.)
47.下列关于RIPV2的说法，那三项是正确的(Choose three.)
A. It has the same maximum hop count as version 1.
A. 与版本一有同样的做大跳数限制
B. It uses broadcasts for its routing updates.
B. 用广播更新路由信息
C. It is a classless routing protocol.
C. 是一个无类的路由协议
D. It has a lower default administrative distance than RIP version 1.
D. 比起版本一有着更低的管理距离
E. It supports authentication.
E. 支持认证
F. It does not send the subnet mask in updates.
F. 在更新信息中不携带子网信息
Answer: ACE
48. What should be part of a comprehensive network security plan?
48.什么能够成为广义安全的一部分
?
A. Allow users to develop their own approach to network security.
A.允许使用者去发展他们符合他们的网络安全
B. Physically secure network equipment from potential access by unauthorized individuals.
B.物理上的的安全设备被未授权的个体就能潜在的接入
C. Encourage users to use personal information in their passwords to minimize the likelihood of
passwords being forgotten.
C.鼓励使用者去使用个人信息到他们的密码里
,而尽可能的减少密码被忘记的可能性
D. Delay deployment of software patches and updates until their effect on end-user equipment is
well known and widely reported.
D.软件补丁和更新的推迟部署,直到他们的影响是在用户设备众所周知和得到广泛的报告
E. Minimize network overhead by deactivating automatic antivirus client updates.
E.通过客户自动更新病毒来减少网络的管理费用
答案
B
49. How should a router that is being used in a Frame Relay network be configured to avoid split
horizon issues from preventing routing updates?
49.怎样路由器配置才能够避免水平分割阻止路由更新？
A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to
the sub-interface.
A．为每个有独一无二DLCI的PVC配置一个分隔的子接口，并且给子接口分配
分隔的子网
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B. Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast
traffic.
B．配置每个点到点帧中继电路支持多播和广播流量
C. Configure many sub-interfaces on the same subnet.
C．在相同子网上配置许多子接口
D. Configure a single sub-interface to establish multiple PVC connections to multiple remote
router interfaces.
D．配置一个单独的子接口去建立多个PVC连接到多个远程路由器的接口上
答案
A
50.此题与41题是重复的。
51. Which two statements best describe the wireless security standard that is defined by WPA?
(Choose two.)
51.下列哪两项正确描述了由
WPA定义的无线安全标准
? (Choose two.)
A. It specifies use of a static encryption key that must be changed frequently to enhance security.
A. 定制了一个经常更换的静态的加密密钥来增强安全性。
B. It requires use of an open authentication method.
B. 需要使用公开的认证方法。
C. It specifies the use of dynamic encryption keys that change each time a client establishes a
connection.
C. 它规定了每次当一个客户端连接的时候都要一次动态的加密密钥。
D. It requires that all access points and wireless devices use the same encryption key.
D. 要求所有的接入点都使用相同的加密密钥。.
E. It includes authentication by PSK..
E. 它包括PSK的认证。
Answer: CE
52. Refer to the exhibit. Router1 was just successfully rebooted. Identify the current OSPF router
ID for Router1
52.由图知，ROUTER1重启过后，
OSPF的RID是？
A. 190.172.32.10
B. 208.149.23.162
C. 208.149.23.194
D. 220.173.149.10
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Answer: C
53. What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)
53.以下什么情况可以使得网络管理员使用
ppp第二层封装？
A. VLAN支持
B. 压缩
C. 认证
D. 滑动窗口机制
E. 多链路支持
F. QoS
Answer: BCE
54. Refer to the exhibit. What is the meaning of the term dynamic as displayed in the output of the
show frame-relay map command shown?
54.由图所示show frame-relay map 这条命令显示的“dynamic”是什么意思？
A. The Serial0/0 interface is passing traffic.
A. Serial0/0接口有流量通过。
B. The DLCI 100 was dynamically allocated by the router..
B. DLCI 100由路由器动态分配。
C. The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server.
C. Serial0/0接口通过
DHCP服务器获得的IP地址为172.16.3.1.
D. The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay
cloud.
D.在帧中继云中DLCI100动态变化以适应变化。
E. The mapping between DLCI 10
0 and the end station IP address 172.16.3.1 was learned through
Inverse ARP
E.DLCI 100和终端设备IP地址172.16.3.1的映射是通过反向
ARP学到的。
Answer: E
55. What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5
172.35.16.5?
55.Cisco IOS 命令ip nat inside source static 10.1.1.5 172.35.16.5的作用是什么
?
A. It creates a global address pool for all outside NAT transactions.
A. 为所有的外部NAT创建一个全局的地址池
.
B. It establishes a dynamic address pool for an inside static address.
B. 为内部的静态地址创建动态的地址池。
C. It creates dynamic source translations for all inside local PAT transactions.
C．它为所有内部本地PAT创建创建了动态源地址转换
D. It creates a one-to-one mapping between an inside local address and an inside global address.
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D.为内部本地地址和内部全局地址创建一对一的映射关系.
E. It maps one inside source address to a range of outside global addresses.
E. 映射了一个内部源地址到一个范围的外部全局地址。
Answer: D
56. Refer to the exhibit. What is the effect of the configuration that is shown?
56.由图所示下图的配置会产生什么影响？
A. It configures SSH globally for all logins.
A.为所有的登陆配置SSH。
B. It tells the router or switch to try to establish an SSh connection first and if that fails to use
Telnet.
B. 先建立SSH连接，如不成功则建立Telne
C. It configures the virtual terminal lines with the password 030752180500.
C. 为虚拟终端配置密码为：
030752180500.
D. It configures a Cisco network device to use the SSH protocol on incoming communications via
the virtual terminal ports.
D.配置思科网路设备通过虚拟终端介入的会话采用SSH协议。
E. It allows seven failed login attempts before the VTY lines are temporarily shutdown.
E.在登陆VTY线路时允许七次登陆失败的尝试。.
Answer: D
57. Refer to the exhibit. When PC1 sends an ARP request for the MAC address of PC2, network
performance slows dramatically, and the switches detect an unusually high number of broadcast
frames. What is the most likely cause of this?
57由图所示.当PC1向PC2发送ARP请求时，网络性能急剧减缓，交换机检测到大量不寻常的
广播帧。其原因是？
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A. The portfast feature is not enabled on all switch ports
A.在所有的交换机端口上没有开启POTFAST. （一种生成树技术在BCMSN中有涉及）
B. The PCs are in two different VLANs.
B.两台主机在不同的
VLAN。
C. Spanning Tree Protocol is not running on the switches.
C. 交换机没有运行生成树协议。
D. PC2 is down and is not able to respond to
the request.
D. PC2没有办法回应
PC1的ARP请求。
E. The VTP versions running on the two switches do not match
E.两台交换机的VTP版本号不一致。
Answer: C
58. An administrator issues the command ping 127.0.0.1 from the command line prompt on a PC.
If a reply is received, what does this confirm?
58.网络管理员用在本机
ping127.0.0.1成功，则表明。
A. The PC has connectivity with a local host.
A. PC链接到本地的一台主机。
B. The PC has connectivity with a Layer 3 device.
B. PC链接到一个三层设备。
C. The PC has a default gateway correctly configured.
C.PC正确配置了默认网关。
D. The PC has connectivity up to Layer 5 of the OSI model.
D. PC可以与OSI模型的第五层通信
E. The PC has the TCP/IP protocol stack correctly installed
E.PC正确安装TCP/IP协议簇.
Answer: E
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59. Refer to the exhibit. The network administrator requires easy configuration options and
minimal routing protocol traffic. What two options provide adequate routing table information for
traffic that passes between the two routers and satisfy the requests of the network administrator?
(Choose two.)
59.由图所示网络管理员要求方便的配置路由器和尽可能的减少路由协议所产生的流量，下
面哪两种做法，可以提供足够的路由表信息，有可以符合网络管理员的要求？
A. a dynamic routing protocol on InternetRouter to advertise all routes to CentralRouter.
A.在InternetRouter 上使用动态路由选择协议来通告路由条目给
CentralRouter .
B. a dynamic routing protocol on InternetRouter to advertise summarized routes to CentralRouter.
B.在InternetRouter 上使用动态路由选择协议来通告汇总的路由条目给
CentralRouter
C. a static route on InternetRouter to direct traffic that is destined for 172.16.0.0/16 to
CentralRouter.
C.在InternetRouter上做指向172.16.0.0/16网段的动态路由下一条为
CentralRouter.
D. a dynamic routing protocol on CentralRouter to advertise all routes to InternetRouter.
D.在CentralRouter上用动态路由选择协议通告所有的路由条目给InternetRouter
E. a dynamic routing protocol on CentralRouter to advertise summarized routes to InternetRouter.
E.在CentralRouter上用动态路由选择协议通告汇总的路由条目给InternetRouter
F. a static, default route on CentralRouter that directs traffic to InternetRouter.
F..在CentralRouter上用静态路由或默认路由指向InternetRouter.
Answer: CF
60. What are some of the advantages of using a router to segment the network? (Choose two.)
60.用路由器分隔网络的优点是什么
? (Choose two.)
A. Filtering can occur based on Layer 3 information.
A. 可以在三层做过滤。
B. Broadcasts are eliminated.
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B. 消除广播.
C. Routers generally cost less than switches.
C. 路由器一般比交换机便宜
D. Broadcasts are not forwarded across the router.
D. 广播不能穿越路由器.
E. Adding a router to the network decreases latency.
E. 为网络添加路由可以减少延迟
Answer: AD
61. Refer to the exhibit. What is the meaning of the output MTU 1500 bytes?
61.据图所示MTU1500是什么意思？
A. The maximum number of bytes that can traverse this interface per second is 1500.
A. 接口每秒通过字节的最大数1500bytes。
B. The minimum segment size that can traverse this interface is 1500 bytes.
B. 接口允许通过的最小分段为
1500bytes.
C. The maximum segment size that can traverse this interface is 1500 bytes.
C. 接口允许通过的最大分段为
1500bytes.
D. The minimum packet size that can traverse this interface is 1500 bytes.
D. 接口允许通过的最小数据包为1500bytes..
E. The maximum packet size that can traverse this interface is 1500 bytes.
E. 接口允许通过的最大数据包为
1500bytes..
F. The maximum frame size that can traverse this interface is 1500 bytes.
F. 接口允许通过的最大帧为1500bytes.
Answer: E
62. There are no boot system commands in a router configuration in NVRAM. What is the
fallback sequence that the router will use to find an IOS during reload?
62. 在路由器的NVRAM中没有配置启动系统命令。什么路由器将去发现
IOS直到加载上的
fallback序列号
?
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A. TFTP server, Flash, NVRAM
B. ROM, NVRAM, TFTP server
C. NVRAM, TFTP server, ROM
D. Flash, TFTP server, ROM
E. Flash, NVRAM, ROM
Answer: D
63. Refer to the output from the show running-config command in the exhibit. What should the
administrator do to allow the workstations connected to the FastEthernet 0/0 interface to obtain an
IP address?
63.如图所示网络管理员应该怎么做才能使得工作在计算机连接到
FastEthernet 0/0接口获取
IP地址？
A. Apply access-group 14 to interface FastEthernet 0/0.
A. 在FastEthernet 0/0接口应用
access-group 14。
B. Add access-list 14 permit any any to the access list configuration.
B. ACL中添加
access-list 14 permit any any
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C. Configure the IP address of the FastEtherent 0/0 interface to 10.90.201.1.
C. 配置FastEtherent 0/0的IP地址为10.90.201.1.
D. Add an interface description to the FastEthernet 0/0 interface configuration.
D. 给 FastEthernet 0/0接口添加描述性语句
.
Answer: C
64. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in
a switched LAN?
64.在哪种情况下，同一个单播帧被复制多个在
LAN中传输
?
A. during high traffic periods
A. 在流量达到高峰的时候
B. after broken links are re-established
B. 在被破坏的链路重新恢复正常的时候。
C. when upper-layer protocols require high reliability
C. 当上层的协议需要高可靠性时。
D. in an improperly implemented redundant topology
D. 存在不正确的冗余链路。
E. when a dual ring topology is in use
E. 在使用环形拓扑的时候。
Answer: D
65. Which of the following describe private IP addresses? (Choose two.)
65.下列哪些是对私有
IP地址的描述？（two）
A. addresses chosen by a company to communicate with the Internet
A. 公司使用的与互联网联通的地址。
B. addresses that cannot be routed through the public Internet
B.在公网上不能被路由的地址。
C. addresses that can be routed through the public Internet
C. 在公网上可以被路由的地址。
D. a scheme to conserve public addresses
D. 节省公网地址使用的方案。
E. addresses licensed to enterprises or ISPs by an Internet registry organization
E. 由一个互联网注册组织授权地址给企业或互联网服务供应商，
Answer: BD
66. Refer to the exhibit. A network administrator is adding two new hosts to SwitchA. Which
three values could be used for the configuration of these hosts? (Choose three.)
66.根据图示网络管理员在
SwitchA上增加两台新主机，用下面那三个选项来配置这些主机？
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A. host 1 IP address: 192.168.1.79
A. host 1 IP 地址: 192.168.1.79
B. host 1 IP address: 192.168.1.64
B. host 1 IP 地址92.168.1.64
C. host 1 default gateway: 192.168.1.78
C. host 1 默认网关
: 192.168.1.78
C. host 1 default gateway: 192.168.1.78
D. host 2 IP 地址192.168.1.128
D. host 2 IP address: 192.168.1.128
E. host 2 默认网关
192.168.1.129
E. host 2 default gateway: 192.168.1.129
F. host 2 IP 地址192.168.1.190
F. host 2 IP address: 192.168.1.190
Answer: ACF
67. Which of the following statements are true regarding bridges and switches? (Choose 3.)
67.下列关于网桥和交换机的说法哪些是正确的
? (Choose 3.)
A. Switches are primarily software based while bridges are hardware based.
A. 交换机基于软件，网桥基于硬件。.
B. Both bridges and switches forward Layer 2 broadcasts.
B. 网桥和交换机都转发二层广播。
C. Bridges are frequently faster than switches.
C. 网桥比交换机速度快。
D. Switches have a higher number of ports than most bridges..
D. 交换机比网桥有更多的端口。
E. Bridges define broadcast domains while switches define collision domains.
E. 网桥分割广播域，交换机分割冲突域。
F. Both bridges and switches make forwarding decisions based on Layer 2 addresses.
F. 网桥和交换机都通过二层地址转发。
Answer: BDF
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68. Which of the following describes the roles of devices in a WAN? (Choose three.)
68.下列哪些选项正确描述了
WAN设备的用途
? (Choose three.) （不会整）
A. CSU/DSU terminates a digital local loop.
A. CSU/DSU防止数字本地环路。（注：本题库由
https://www.360docs.net/doc/8312776714.html,翻译小组原创,转载请注明出
处:https://www.360docs.net/doc/8312776714.html,）
B. A modem terminates a digital local loop.
B. modem防止数字本地环路
.
C. A CSU/DSU terminates an analog local loop.
C. A CSU/DSU终止一个模拟本地环路
D. A modem terminates an analog local loop.
D.一个调制解调器终止一个模拟本地环路
E. A router is commonly considered a DTE device.
E. 一台路由器通常是认为是一台
DTE设备
F. A router is commonly considered a DCE device.
F.一台路由器通常认为是一台DCE设备
Answer: ADE
69. A router receives information about network 192.168.10.0/24 from multiple sources. What
will the router consider the most reliable information about the path to that network?
69. 如果一台路由器从多个源那里接收到
192.168.10.0/24，那么最可信的路由条目是用什么
标准来判断的?
A. a directly connected interface with an address of 192.168.10.254/24
A. 一个直连接口的IP地址是
192.168.10.254/24
B. a static route to network 192.168.10.0/24
B. 有去往192.168.10.0/24的静态路由。
C. a RIP update for network 192.168.10.0/24
C. 从192.168.10.0/24发来的
RIP更新包。
D. an OSPF update for network 192.168.0.0/16
D. 从192.168.10.0/24发来的
OSPF更新包
E. a default route with a next hop address of 192.168.10.1
E. 一个默认路由的下一跳的
IP地址为
192.168.10.1
F. a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop
F. 一条静态路由为192.168.10.0/24且配置的本地接口为下一跳
Answer: A
70. Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN?
(Choose three.)
70.与LAN相比WAN更喜欢哪种第二层封装
? (Choose three.)
A. HDLC
B. Ethernet
C. Token Ring
D. PPP
E. FDDI
F. Frame Relay
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Answer: ADF
71. What can be determined from the router output shown in the graphic?
71．从下图的路由器输出可以确定什么？
A. 200.1.1.64 is a default route.
A. 200.1.1.64是默认路由。
B. The output shows that there are three default routes.
B. 输出显示有三条默认路由。
C. The output came from router R2.
C. 以上是R2的输出
D. The output came from a router that has four physical interfaces.
D.以上输出是来自有四个物理接口的路由.
E. EIGRP is in use in this network.
E.在上图所示网络中使用了EIGRP
Answer: E
72. Which additional configur
ation step is necessary in order to connect to an access point that has
SSID broadcasting disabled?
72.哪个附加配置的步骤是必要的为了连接到
SSID广播关闭的接入点?
A. Set the SSID value in the client software to public.
A.在客户软件设置
SSID值公开
B. Configure open authentication on the AP and the client.
B.在
AP和客户配置开放认证
C. Set the SSID value on the client to the SSID configured on the AP.
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C.在客户上设置和
AP上配置
SSID相同的
SSID值
D. Configure MAC address filtering to permit the client to connect to the AP.
D.配置
MAC地址过滤去允许客户去连接到
AP
答案
C
73. Why will a switch never learn a broadcast address?
73.为什么交换机永远学习不到广播地址
?
A. Broadcasts only use network layer addressing.
A. 广播只使用网络层地址。
B. A broadcast frame is never forwarded by a switch.
B. 广播帧不会被交换机转发。
C. A broadcast address will never be the source address of a frame.
C. 广播地址永远不会是一个帧的源地址。
D. Broadcast addresses use an incorrect format for the switching table.
D. 广播地址在MAC地址表中使用不正确的格式
E. Broadcast frames are never sent to switches.
E. 广播帧不会发向一个交换机。
Answer: C
74. Refer to the graphic. Host A has established a connection with the HTTP server attached to
interface E0 of the xyz router. Which of the following statements describe the information
contained in protocol data units sent from host A to this server? (Choose three.)
74.如图所示主机通过
xyz路由器的E0口与HTTP服务器建立连接，下列哪些选项描述了从主
机发往服务器的PDU的正确内容？
A. The destination port number in a segment header will have a value of 80.
A. 在分段的头部，目标端口号是80.
B. The destination port number in a segment header will have a unique value greater than or equal
to 1023.
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B. 在分段的头部，目标端口号是唯一的且大于等于
1023.
C. The destination address of a frame will be the MAC address of the HTTP server interface.
C.帧的目标地址是服务器的
MAC地址。
D. The destination address of a frame will be the MAC address of the E0 interface of the abc
router..
D.帧的目标地址是路由器abc的E0口地址。
E. The destination IP address of a packet will be the IP address of the E0 interface of the abc
router.
E.目标IP地址是路由器abc的E0口地址。
F. The destination IP address of a packet will be the IP address of the network interface of the
HTTP server.
F. 数据包的目标IP地址是
HTTP服务器的IP地址。
Answer: ADF
75. What are two reasons a network administr