【名词&注释】
路由表(routing table)、路由器(router)、优先级(priority)、网络流量控制(network traffic control)
[单选题]当配置一个CISCO的路由器时，缺省的DR和BDR优先级是（）。
B. 1
C. 16
D. 255
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举一反三：
[单选题]路由器上，清空路由表的命令是（）
A. clear ip
B. delete ip route
C. delete route
D. clearip route*
[单选题]NAT可以被用于完成多种功能，以下不属于其功能的是：（）
A. 转换内部局部地址
B. 内部全局地址复用
C. TCP负载均衡
D. 内部网络流量控制(network traffic control)
[单选题]The Ezonexam network administrator has just issued the "switchport trunk native vlan 998" command on switch VE2. What is the function of this command?
A. It designates VLAN 998 as the default for all unknown tagged traffic
B. It designates VLAN 998 for untagged traffic
C. It blocks VLAN 998 traffic from passing on the trunk
D. It creates a VLAN 998 interface
E. None of the above
[单选题]下列对RIP的配置中，合法的命令是（）
A. router rip 100 network 10.12.0.0
B. router rip 100 network 10.0.0.0
C. router rip network 10.12.0.0
D. router rip 100 network 10.0.0.0
[多选题]The Ezonexam network administrator needs to determine what LAN devices to install on the Ezonexam network. What are two advantages of using Layer 2 Ethernet switches over hubs? (Choose two)
A. Allowing simultaneous frame. transmissions
B. Increasing the size of broadcast domains
C. Increasing the maximum length of UTP cabling between devices
D. Filtering frames based on MAC addresses
E. Decreasing the number of collision domains
[单选题]路由器“路由模式”的提示符号是（）
B. (config)
C. (config-if)
D. (config-router)
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