【名词&注释】
路由器(router)、数据包(packet)、目的地(destination)、物理层(physical layer)、一对一(one to one)、数据链路层(data link layer)
[单选题]What is the purpose of the spanning-tree algorithm in a switched LAN?
A. To provide a monitoring mechanism for networks in switched environments.
B. To manage VLANs across multiple switches.
C. To prevent switching loops in networks with redundant switched paths.
D. To segment a network into multiple collision domains.
E. To prevent routing loops in networks.
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学习资料:
[单选题]关于静态NAT,下面()说法是正确的。
A. 静态NAT转换在缺省情况下24小时后超时
B. 静态NAT转换从地址池中分配
C. 静态NAT将内部地址一对一(one to one)静态映射到内部全局地址
D. CISCO路由器缺省使用了静态NAT
[单选题]标准访问控制列表应被放置的最佳位置是在()。
A. 越靠近数据包的源越好
B. 越靠近数据包的目的地越好
C. 无论放在什么位置都行
D. 入接口方向的任何位置
[单选题]介质工作在OSI的哪一层()
A. 物理层
B. 数据链路层(data link layer)
C. 网络层
D. 传输层
[单选题]命令“ping127.0.0.1”的功能是()
A. 测试网卡是否正常
B. 测试网关是否正常
C. 测试TCP/IP协议是否正常
D. 测试介质是否正常
[单选题]Why might the Ezonexam network administrator set the configuration register to 0x2142 on a 2600 series Cisco router?
A. To boot the IOS from ROM
B. To reset the console password
C. To upload a new version of the configuration file
D. To upload a new version of the IOS
E. To allow a new memory upgrade to be recognized by the router
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