[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?

正确答案 ：E

The network layer

解析：解析：Explanation:

[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（）

正确答案 ：D

6

[单选题]路由器下，由一般用户模式进入特权用户模式的命令是：（）

正确答案 ：A

enable

[单选题]介质工作在OSI的哪一层（）

正确答案 ：A

物理层

[单选题]A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?

正确答案 ：A

All defined VLANs are allowed on the trunk by default.

解析：解析：Explanation:

[多选题]Which of the following are types of flow control? (Choose three)

正确答案 ：ACD

Buffering

Windowing

Congestion avoidance

解析：解析：Explanation:Datatransmissionflowcontroloccursatlayer4withthehelpofbuffering,windowingandcongestionavoidance.

[单选题]From where does a small network typically get its IP network addresses or IP block?

正确答案 ：C

From the Internet Service Provider (ISP)

解析：解析：Explanation:

[单选题]在启用IGRP协议时，所需要的参数是：()

正确答案 ：C

自治系统号

[多选题]在配置帧中继子接口时，在物理接口上应该配置的内容是：()

正确答案 ：BCD

封装帧中继协议

指定子接口类型

设定子接口

解析：BCD

[多选题]Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet? (Select all that apply)

正确答案 ：CDE

92.11.178.93

134.178.18.56

192.168.16.87

解析：C,D,E 解析：Explanation:

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