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多选题
下列关于loop back interface的说法（）是不正确的？
A
loop back interface是CISCO路由器上缺省端口
B
loop back interface一个永远不会DOWN的逻辑端口
C
loop back interface是一个做自环测试的端口
D
loop back interface是对端使用LOOPBACK命令测试链路后本端的端口状态
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更多 “多选题下列关于loop back interface的说法（）是不正确的？Aloop back interface是CISCO路由器上缺省端口Bloop back interface一个永远不会DOWN的逻辑端口Cloop back interface是一个做自环测试的端口Dloop back interface是对端使用LOOPBACK命令测试链路后本端的端口状态” 相关考题
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下列关于dowhile„loop和do„loopwhile循环执行循环体次数的描述正确的是()。
A、dowhile„loop循环和do„loopwhile循环至少都执行一次B、dowhile„loop循环可能不执行，do„loopwhile循环至少执行一次C、dowhile„loop循环至少执行一次，do„loopwhile循环可能不执行D、dowhile„loop循环和do„loopwhile循环可能都不执行
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When troubleshooting a Frame Relay connection, what is the first step when performing a loopback test?()
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下列关于loop back interface的说法()是不正确的?
A.loop back interface是CISCO路由器上缺省端口B.loop back interface一个永远不会DOWN的逻辑端口C.loop back interface是一个做自环测试的端口D.loop back interface是对端使用LOOPBACK命令测试链路后本端的端口状态
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Cisco端口配置模式配置命令不正确的是（）。A、interface s0/0B、interface Ethernet1/0C、interface Ethernet1/0/0D、interface 0/0
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下列关于loop back interface的说法（）是不正确的？A、loop back interface是CISCO路由器上缺省端口B、loop back interface一个永远不会DOWN的逻辑端口C、loop back interface是一个做自环测试的端口D、loop back interface是对端使用LOOPBACK命令测试链路后本端的端口状态
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When troubleshooting a Frame Relay connection, what is the first step when performing a loopback test?（）A、Set the encapsulation of the interface to HDLCB、Place the CSU/DSU in local-loop modeC、Enable local-loop mode on the DCE Frame Relay routerD、Verify that the encapsulation is set to Frame Relay
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A user is reporting that their computer is making strange noises and randomly powers off. Which of the following tools would MOST likely be used to troubleshoot this problem?（）A、POST diagnostic cardB、Power supply testerC、Loop back plugD、Cable tester
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单选题When a local loopback is activated on a PPP serial link, what indicates that the local interface is good?（）A
A ping to the local address succeeds.B
A ping to the remote address succeeds.C
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Source IKE/ISAKMP packets off the loop-back address. D
Classify IKE/ISAKMP packets so they are appropriately prioritized.
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