正确答案: A

Show history

题目：After working on a router, some problems arise and you wish to view the commands that you recently entered. Which IOS command opens the history buffer and displays the most recently entered commands?

解析：A 解析：Explanation:

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举一反三的答案和解析：

[单选题]Ezonexam has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?

VTP will allow switches to share VLAN configuration information

[单选题]以下特殊区域中哪一个没有自动下发缺省路由（）

完全NSSA区域

[单选题]下列哪一个通配符掩码与子网172.16.64.0/27的所有主机匹配（）。

0.0.0.31

[单选题]OSI第二层数据封装完成后的名称是：()

帧

[单选题]哪个命令可以成功测试网络：()

Routerping192.5.5.30

[单选题]The Ezonexam network administrator needs to a switch named VE1 to become the root bridge for a redundant path switched network. What can be done to ensure that VE1 will always assume the role as the root bridge?

Configure the switch so that it has lower priority than other switches in the network

[单选题]What is the purpose of the Spanning Tree Protocol (STP)?

To maintain a loop-free Layer 2 network topology

解析：解析：Explanation:

[单选题]路由器上的命令“show version”的功能是（）

显示版本信息

[多选题]默认情况下，IGRP衡量路径好坏时，考虑的因素为（）

带宽

延时

解析：AD