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

题目
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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    下列关于斑点ELISA说法不正确的是


    正确答案:E
    关于斑点一ELISA的描述中(A~D)均正确,但其灵敏度低于常规ELISA。

  • 第2题:

    When troubleshooting a Frame Relay connection, what is the first step when performing a loopback test?()

    A.Set the encapsulation of the interface to HDLC

    B.Place the CSU/DSU in local-loop mode

    C.Enable local-loop mode on the DCE Frame Relay router

    D.Verify that the encapsulation is set to Frame Relay


    参考答案:A

  • 第3题:

    Cisco端口配置模式配置命令不正确的是()。

    • A、interface s0/0
    • B、interface Ethernet1/0
    • C、interface Ethernet1/0/0
    • D、interface 0/0

    正确答案:D

  • 第4题:

    When troubleshooting a Frame Relay connection, what is the first step when performing a loopback test?()

    • A、Set the encapsulation of the interface to HDLC
    • B、Place the CSU/DSU in local-loop mode
    • C、Enable local-loop mode on the DCE Frame Relay router
    • D、Verify that the encapsulation is set to Frame Relay

    正确答案:A

  • 第5题:

    完成A接口倒换后,BSC出现2992错误(BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON A INTERFACE alarm),说明A接口可能存在哪类问题()

    • A、A interface exist crossconnect circuit
    • B、inconsistent CCSPCM between BSC and MSC
    • C、A interface exist loop circuit
    • D、inconsistent circuit number in circuit group between BSC and MSC

    正确答案:B,C

  • 第6题:

    下列关于do while…loop和do…loop until循环执行循环体次数的描述正确的是()。

    • A、do while…loop循环和do…loop until循环至少都执行一次
    • B、do while…loop循环和do…loop until循环可能都不执行
    • C、do while…loop循环至少执行一次,do…loop until循环可能不执行
    • D、do while…loop循环可能不执行,do…loop until循环至少执行一次

    正确答案:D

  • 第7题:

    Which test checks the transmitter and receiver of a local modem?()

    • A、data parity
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  • 第8题:

    An AIX server has 2 network interfaces and the system administrator wants to enable the users on the locally configured network interface to be able to connect to systems configured on the global network interface.  How is it accomplished?()

    • A、Enable routed on the server
    • B、Enable gated on the server
    • C、Enable ipforwarding on the server
    • D、Set network options back to default

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    下列关于APU火警探测说法正确的是()

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    正确答案:D

  • 第10题:

    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


    正确答案: C,A
    解析: 暂无解析

  • 第11题:

    单选题
    A server will not power on. Which of the following devices should the administrator use FIRST to determine the problem?()
    A

     Loop back plugs

    B

     Power supply tester

    C

     System logs

    D

     TDR


    正确答案: D
    解析: 暂无解析

  • 第12题:

    单选题
    What is the best way to ensure that IKE/ISAKMP packets are not dropped when QoS is enabled on the uplink interface of the Teleworker router?()
    A

    QoS and IPSec should never be used together. 

    B

    IKE/ISAKMP packets are DiffSERV codepoint CS6, so the traffic is never dropped.

    C

    Source IKE/ISAKMP packets off the loop-back address. 

    D

    Classify IKE/ISAKMP packets so they are appropriately prioritized.


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    解析: 暂无解析

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    下列关于率和比说法不正确的是


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  • 第15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

    正确答案:A,C,D

  • 第16题:

    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 card
    • B、Power supply tester
    • C、Loop back plug
    • D、Cable tester

    正确答案:B

  • 第17题:

    下列关于Do…Loop语句的叙述不正确的是()。

    • A、Do…Loop语句采用逻辑表达式来控制循环体执行的次数
    • B、当Do While…Loop或Do Until…Loop语句中While或Until后的表达式的值为True或非零时,循环继续
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    正确答案:B

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    A technician is called for a computer that is not connecting to the network. Which of the following would be the MOST common tool used to identify the issue? ()

    • A、Cable tester
    • B、Multimeter
    • C、Loop back plugs
    • D、Crossover cable

    正确答案:A

  • 第19题:

    A server will not power on. Which of the following devices should the administrator use FIRST to determine the problem?()

    • A、Loop back plugs
    • B、Power supply tester
    • C、System logs
    • D、TDR

    正确答案:B

  • 第20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、A ping to the remote address received a 'TTL expired' message.
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    正确答案:D

  • 第21题:

    单选题
    The steam boiler is part of a closed loop steam, whereby, after the energy of the steam is used up and it becomes water again, () is collected and returned back to the boiler for heating up again to steam.
    A

    the former

    B

    the first

    C

    the latter

    D

    the last


    正确答案: C
    解析: 暂无解析

  • 第22题:

    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

    A ping to the remote address received a 'TTL expired' message.

    D

    The interface shows a flag indicating that a loop is detected.


    正确答案: A
    解析: 暂无解析

  • 第23题:

    单选题
    For a L√Opurifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will ().
    A

    be interrupted

    B

    move downwards

    C

    move outwards

    D

    retain original position


    正确答案: D
    解析: 暂无解析