【名词&注释】
可靠性(reliability)、路由器(router)、应用层(application layer)、会话层(session layer)
[单选题]The network administrator has configured port security on a Ezonexam switch. Why would a network administrator configure port security on this Ezonexam device?
A. To prevent unauthorized hosts from getting access to the LAN
B. To limit the number of Layer 2 broadcasts on a particular switch port
C. To prevent unauthorized Telnet or SSH access to a switch port
D. To prevent the IP and MAC address of the switch and associated ports
E. None of the above
查看答案&解析
举一反三：
[单选题]What is the purpose of the Spanning Tree Protocol (STP)?
A. To prevent routing loops
B. To create a default route
C. To provide multiple gateways for hosts
D. To maintain a loop-free Layer 2 network topology
E. To enhance the functions of SNMP
[多选题]默认情况下，IGRP衡量路径好坏时，考虑的因素为（）
A. 带宽
B. 可靠性
C. 最大传输单元
D. 延时
[单选题]FTP工作在OSI哪一层（）
A. 会话层(session layer)
B. 表示层
C. 传输层
D. 应用层
[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]路由器“特权模式”的提示符是：（）
A. >
B.
C. (config)
D. (config-if)
[多选题]You need to configure an 802.1Q link on a Ezonexam switch. Which commands, when used together, would do this? (Select two answer choices)
A. Switch(vlan) mode trunk
B. Switch(config) switchport access mode trunk
C. Switch(config-if) switchport mode trunk
D. Switch(config-if) switchport trunk encapsulation dot1q
E. Switch(config) switchport access mode 1
F. F. Switch(vlan) trunk encapsulation dot1q
[单选题]对于使用链路状态路由协议的路由器如何选择最佳路线到达子网，下列哪项是正确的（）
A. 路由器会发现链路状态数据库中的最佳路由
B. 通过针对链路状态数据库中的信息运行SPF算法，路由器会计算出最佳路由
C. 路由器将比较每个邻居接收到的更新中为子网列出的标准，并挑选最佳标准路由
D. 路由器会使用具有最低条数的路径
[多选题]Regarding the extended ping command; which of the statements below are true?(Select all valid answer choices)
A. The extended ping command is supported from user EXEC mode.
B. The extended ping command is available from privileged EXEC mode.
C. With the extended ping command you can specify the TCP and UDP port to be pinged.
D. With the extended ping command you can specify the timeout value.
E. With the extended ping command you can specify the datagram size.
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