【名词&注释】
路由表(routing table)、路由器(router)、管理机制、交换机(switch)、数据包(packet)、不一致(inconsistency)、目的地(destination)、帧中继(frame relay)、广域网协议
[单选题]配置路由器特权用户“加密密码”的命令是：()
A. password
B. enable password
C. enable secret
D. passwd
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举一反三：
[单选题]The Ezonexam network administrator has issued the "VTP password ezonexam" command on a Cisco device. What is the purpose of this command?
A. It allows two VTP servers to exists in the same domain, each configured with different passwords
B. It is the password required when promoting a switch from VTP client mode to VTP server mode
C. It is used to access the VTP server to make changes to the VTP configuration
D. It is used to validate the sources of VTP advertisements sent between switches
E. None of the above
[多选题]You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?
A. Switch(config) switchport trunk encapsulation isl
B. Switch(config) switchport trunk encapsulation ietf
C. Switch(config-if) switchport trunk encapsulation isl
D. Switch(config-if) switchport trunk encapsulation ietf
E. Switch(config-if) switchport trunk encapsulation dot1q
[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(destination)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]路由器上，命令“show int s0”的显示结果为：Serial0 is up,line protocol is down出现该结果的可能原因是（）
A. 端口处于关闭状态
B. 物理端口被烧毁
C. 两端设备协议不一致
D. 路由表中无路由
[单选题]Which command on router EzonexamA will assign the last usable IP address from the 192.168.32.128/28 subnetwork to a router interface?
A. EzonexamA(config-if) ip address 192.168.32.142 255.255.255.240
B. EzonexamA(config-if) ip address 192.168.32.143 255.255.255.240
C. EzonexamA(config-if) ip address 192.168.32.158 255.255.255.240
D. EzonexamA(config-if) ip address 192.168.32.145 255.255.255.240
E. EzonexamA(config-if) ip address 192.168.32.144 255.255.255.240
F. F. EzonexamA(config-if) ip address 192.168.32.158 255.255.255.240
G. G. None of the above
[多选题]网络中经常使用“帧中继(frame relay)”服务，请选出帧中继(frame relay)的优点（）
A. 偷占带宽
B. 提供拥塞管理机制
C. 可以使用任意广域网协议
D. 灵活的接入方式
[单选题]After connecting a PC to an available port on a switch, you find that the PC can not access any of the resources on the LAN. No other PC's connected to the switch appear to be having any issues. What is the most likely cause for this problem?
A. The router lacks a routing table entry for the new host
B. The host switch port is assigned to the incorrect VLAN
C. The host MAC address is incorrectly configured
D. A STP instance for the new host has not been initialized
E. The switch does not have the MAC address hard coded in the CAM table.
[多选题]请选出交换机处理帧的三种模式：()
A. 直通模式
B. 存储转发模式
C. 侦测模式
D. 分段模式
E. 阻塞模式
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