正确答案: B

interface

题目：帧中继环境中，在物理端口上，建立子接口的命令是（）

解析：B

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举一反三的答案和解析：

[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（）

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?

It is used to validate the sources of VTP advertisements sent between switches

[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（）

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?

172.16.208.0

解析：解析：Explanation:

[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()

255.255.255.240

[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.

Connect the PC's COM port to the router's console port using a rollover cable.

解析：B 解析：Explanation:

[多选题]网络中经常使用“帧中继”服务，请选出帧中继的优点（）

偷占带宽

提供拥塞管理机制

灵活的接入方式

解析：ABD

[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?

The network layer

解析：解析：Explanation: