【名词&注释】
路由表(routing table)、管理机制、子网掩码(subnet mask)、帧中继(frame relay)、广域网协议
[单选题]帧中继环境中，在物理端口上，建立子接口的命令是（）
A. create
B. interface
C. encapsulation
D. ip address
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举一反三：
[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP和掩码结合划分子网时，每个子网的容量为（）
A. 8
B. 4
C. 12
D. 6
[单选题]The Ezonexam network administrator has issued the "VTP password ezonexam" command on a Cisco device. What is the purpose of this command?
A. It allows two VTP servers to exists in the same domain, each configured with different passwords
B. It is the password required when promoting a switch from VTP client mode to VTP server mode
C. It is used to access the VTP server to make changes to the VTP configuration
D. It is used to validate the sources of VTP advertisements sent between switches
E. None of the above
[单选题]路由表中，某条路由的“路由代码为D”，则表明该路由为（）
A. 直连路由
B. 静态路由
C. IGRP路由
D. EIGRP路由
[单选题]A Ezonexam PC has the IP address 172.16.209.10 /22. What is the subnet of this address?
A. 172.16.42.0
B. 172.16.107.0
C. 172.16.208.0
D. 172.16.252.0
E. 172.16.254.0
[单选题]某网络中，拟设计10子网，每个子网中放有14台设备，用IP地址段为199.41.10.X，请问符合此种规划的子网掩码是()
A. 255.255.255.0
B. 255.255.240.0
C. 255.255.255.240
D. 255.248.0.0
[单选题]You are given a PC, a router, and a cable. Select the correct combination that will allow you to log into router VE1 locally using a terminal emulation program such as HyperTerminal.
A. Connect the PC's COM port to the router's console port using a straight-through cable.
B. Connect the PC's COM port to the router's console port using a rollover cable.
C. Connect the PC's COM port to the router's Ethernet port using a straight-through cable.
D. Connect the PC's Ethernet port to the router's Ethernet port using a rollover cable.
E. Connect the PC's Ethernet port to the router's Ethernet port using a straight- through cable.
F. F. None of the above
[多选题]网络中经常使用“帧中继”服务，请选出帧中继的优点（）
A. 偷占带宽
B. 提供拥塞管理机制
C. 可以使用任意广域网协议
D. 灵活的接入方式
[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
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