【名词&注释】
过滤器(filter)、路由器(router)、优先级(priority)、数据包(packet)、第二层(the second layer)、客户端模式(client mode)
[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
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举一反三：
[单选题]OSI第二层(the second layer)数据封装完成后的名称是：()
A. 比特
B. 包
C. 帧
D. 段
[单选题]You are a senior network administrator at Ezonexam, and while performing the password recovery procedure on your 2500 series Cisco router, you type in the following command:o/r 0x2142
A. What is the purpose of this command?
B. It is used to restart the router.
C. It is used to bypass the configuration in NVRAM.
D. It is used to enter ROM Monitor mode.
E. It is used to view the lost password.
F. It is used to save the changes to the configuration.
[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
[单选题]A Ezonexam switch is configured with all ports assigned to VLAN 2. In addition, all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
A. The additions will create more collisions domains.
B. IP address utilization will be more efficient.
C. More bandwidth will be required than was needed previously.
D. An additional broadcast domain will be created.
E. The possibility that switching loops will occur will increase dramatically.
[单选题]下列对访问控制列表的描述不正确的是（）。
A. 访问控制列表能决定数据是否可以到达某处
B. 访问控制列表可以用来定义某些过滤器
C. 一旦定义了访问控制列表，则其所规范的某些数据包就会严格被允许或拒绝
D. 访问控制列表可以应用于路由更新的过程当中
[单选题]VLAN主干协议VTP的默认工作模式是()
A. 服务器模式
B. 客户端模式(client mode)
C. 透明模式
D. 以上三者都不是
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