CCNA考试题库中英文翻译版及答案

CCNA考试题库中英文翻译版及答案．
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
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 addedhost
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FastEthernet0/13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
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
D. UDP
C. TCP
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
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.
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
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
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.
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 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
A. 10.10.0.1
B. 10.10.0.2
C. 199.99.9.33
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
B. router
A. hub
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?
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-config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.
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
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
串行链路封装不正确D. D. The serial line encapsulations are incompatible.
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?
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?
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?
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
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255.255.255.252,在下面的答案中，哪三个是正确的?
A. The Manchester serial address 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?
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,出现的信息是剜煥敵瑳琠浩摥漠瑵那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
应用层F. F. the application layer
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
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)# login
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?
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
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 active link with normal traffic activity.
这个端口的活动链路上有流量。

D.
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.
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
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
虚拟局域网D. D. VLANs
E. VTP E.VTP
F. wireless LANs F.无线局域网
Answer: AD。