[单选题]OSI七层模型中，“包”是哪一层数据封装的名称（）

正确答案 ：C

网络层

[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

[单选题]You want to upgrade the Ezonexam LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?

正确答案 ：C

Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

[单选题]备份路由器IOS的命令是：()

正确答案 ：A

copy flash tftp

[单选题]You need to decide on which trunking method to implement in the Ezonexam network. What is a characteristic of ISL and 802.1q frame. tagging in a switched LAN environment?

正确答案 ：E

They provide inter-switch VLAN communication.

解析：解析：Explanation: A trunk link is the other type of Layer 2 port supported on Cisco switches. When a trunk port is configured, it begins marking frames as they exit the port to indicate which VLAN each frame. is associated with.

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