1. [单选题]标准访问控制列表应被放置的最佳位置是在（）。
A. 越靠近数据包的源越好
B. 越靠近数据包的目的地越好
C. 无论放在什么位置都行
D. 入接口方向的任何位置
2. [单选题]在路由器上，命令show access-list的功能是（）
A. 显示访问控制列表内容
B. 显示路由表内容
C. 显示端口配置信息
D. 显示活动配置文件(configuration file)
3. [单选题]备份路由器IOS的命令是：()
A. copy flash tftp
B. copy running-configt ftp
C. copy IOS tftp
D. copy startup-configt ftp
4. [单选题]关于帧中继(frame relay)的说法，正确的是（）
A. 速率最大为1Mbit/s
B. 不提供差错校验功能
C. 可以偷占带宽
D. 数据传输质量高于DDN
5. [单选题]While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."At which OSI layer is this problem associated with?
A. The data link layer
B. The application layer
C. The access layer
D. The session layer
E. The network layer
6. [多选题]CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)
A. To determine the status of network services on a remote device
B. To obtain the IP Address of a connected device in order to telnet to the device
C. To verify the type of cable interconnecting two devices
D. To verify Layer 2 connectivity between two devices when Layer 3 fails
E. To obtain VLAN information from directly connected swticehs
F. F. To determine the status of the routing protocols between directly connected routers
G. G. To support automatic network failover during outages
7. [单选题]帧中继(frame relay)环境下，为了区分虚电路，应该使用的地址是（）
A. IP地址
B. MAC地址
C. DLCI
D. IPX地址
8. [单选题]命令“ping127.0.0.1”的功能是（）
A. 测试网卡是否正常
B. 测试网关是否正常
C. 测试TCP/IP协议是否正常
D. 测试介质是否正常
9. [单选题]在路由表中到达同一网络的路由有：静态路由、RIP路由、IGRP路由，OSPF路由，则路由器会选用哪条路由传输数据：()
A. 静态路由
B. RIP路由
C. IGRP路由
D. OSPF路由
10. [单选题]What is the purpose of the spanning-tree algorithm in a switched LAN?
A. To provide a monitoring mechanism for networks in switched environments.
B. To manage VLANs across multiple switches.
C. To prevent switching loops in networks with redundant switched paths.
D. To segment a network into multiple collision domains.
E. To prevent routing loops in networks.
