【名词&注释】
路由表(routing table)、路由器(router)、交换机(switch)、数据包(packet)、帧中继(frame relay)
[单选题]下列关于路由器和交换机的描述中，错误的是（）
A. 路由器可以用来连接internet
B. 二层交换机可以用来实现“异地网络”互连
C. 路由器可以用来做路径选择
D. 交换机可以转发广播
查看答案&解析
举一反三：
[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?
A. They are used to find the best path through a network.
B. They allow the exchange of filtering tables.
C. They specify different implementations of the Spanning-Tree Protocol.
D. They allow the exchange of routing tables
E. They provide inter-switch VLAN communication.
[多选题]CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)
A. To determine the status of network services on a remote device
B. To obtain the IP Address of a connected device in order to telnet to the device
C. To verify the type of cable interconnecting two devices
D. To verify Layer 2 connectivity between two devices when Layer 3 fails
E. To obtain VLAN information from directly connected swticehs
F. F. To determine the status of the routing protocols between directly connected routers
G. G. To support automatic network failover during outages
[单选题]在地址转换中，()用来规定哪些数据包需要进行地址转换
A. 在线用户表
B. 访问控制列表
C. MAC地址表
D. 路由表
[单选题]关于帧中继(frame relay)的说法，正确的是（）
A. 速率最大为1Mbit/s
B. 不提供差错校验功能
C. 可以偷占带宽
D. 数据传输质量高于DDN
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