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When you use the ping command to send ICMP messages across a network, what's the most common request/reply pair you'll see? (Select one answer choice)A．Echo request and Echo replyB．ICMP hold and ICMP sendC．ICMP request and ICMP replyD．Echo off and Echo on

题目

When you use the ping command to send ICMP messages across a network, what's the most common request/reply pair you'll see? (Select one answer choice)

A．Echo request and Echo reply

B．ICMP hold and ICMP send

C．ICMP request and ICMP reply

D．Echo off and Echo on

E．None of the above

相似考题

1.ICMP报文的类型字段为8、代码字段为0，代表ICMP（）。A.Echo请求报文B.Echo应答报文C.超时报文D.目的不可达报文

2.What kind of message does a PING send out to test connectivity?()A. ICMP echo requestB. Information interrupt requestC. Timestamp replyD. Source quenchE. None of the above

3.What command verifies connectivity between two hosts by sending and receiving ICMP echo messages?()A. pingB. tracertC. netstatD. show cdp neighbors detailE. show ip routeF. traceroute

4.Which two statements regarding traceroute on JUNOS devices are correct?()A.Traceroute transmits ICMP echo-request packets.B.Traceroute transmits UDP packets.C.Traceroute receives ICMP echo-reply packets.D.Traceroute receives ICMP port-unreachable packets.

更多“When you use the ping command to send ICMP messages across a network, what's the most common request/reply pair you'll see? (Select one answer choice)A．Echo request and Echo replyB．ICMP hold and ICMP sendC．ICMP request and ICMP replyD．Echo off and Echo on”相关问题

  • 第1题：

    WhichconfigurationwouldmakeanIPSLAprobeuseaprecedencevalueof3?()

    A.ipsla1icmp-echo1.1.1.1 tos12

    B.ipsla1icmp-echo1.1.1.1 tos96

    C.ipsla1icmp-echo1.1.1.1 precedence3

    D.ipsla1icmp-echo1.1.1.1 dscp12


    参考答案：B

  • 第2题：

    源主机ping 目的设备时，如果网络工作正常，则目的设备在接收到该报文后，将会向源主机回应ICMP( )报文。


    A.Echo Request
    B.Echo Reply
    C.TTL-Exceeded
    D.Port-Unreachable


    答案：B
    解析：
    源主机ping 目的设备时，如果网络工作正常，则目的设备在接收到该报文后，将会向源主机回应ICMP Echo Reply 报文。

  • 第3题：

    Which configuration would make an IP SLA probe use a precedence value of 5？（）

    • A、ip sla 1 icmp-echo 1.1.1.1 tos 160
    • B、ip sla 1 icmp-echo 1.1.1.1 tos 20
    • C、ip sla 1 icmp-echo 1.1.1.1 precedence 5
    • D、ip sla 1 icmp-echo 1.1.1.1 dscp 20

    正确答案:A

  • 第4题：

    A Network Engineer is reporting that one of the AIX hosts is generating too much ICMP traffic, which is slowing the network.  Which of the following options is the most probable cause?（）

    • A、A large FTP job is in process. 
    • B、A network interface was misconfigured. 
    • C、The ping command is being used excessively. 
    • D、A bad network interface card and/or network cable is in use. 

    正确答案:C

  • 第5题：

    PING命令使用ICMP的（）code类型。

    • A、Direct
    • B、Echo reply
    • C、Destination Unreachable
    • D、以上答案都不正确

    正确答案:B

  • 第6题：

    PING命令使用了哪种ICMP？正确的选项是（）

    • A、Redirect
    • B、Source quench
    • C、Echo reply Destination unreachable

    正确答案:C

  • 第7题：

    What kind of message does a PING send out to test connectivity?（）

    • A、ICMP echo request
    • B、Information interrupt request
    • C、Timestamp reply
    • D、Source quench
    • E、None of the above

    正确答案:A

  • 第8题：

    应用程序PING发出的是（）报文。

    • A、TCP请求
    • B、TCP应答报文
    • C、ICMP Echo请求报文
    • D、ICMP Echo应答报文

    正确答案:C

  • 第9题：

    PING命令使用了哪种ICMP（）。

    • A、Redirect
    • B、Source quench
    • C、Echo reply
    • D、Destination unreachable

    正确答案:C

  • 第10题：

    Which CLI command do you use to determine which files are cleanup candidates?（）

    • A、request system storage cleanup candidates
    • B、request system services storage candidates
    • C、request system services candidate cleanup
    • D、request system storage cleanup dry-run

    正确答案:D

  • 第11题：

    单选题
    What command verifies connectivity between two hosts by sending and receiving ICMP echo messages?（）
    A

    ping

    B

    tracert

    C

    netstat

    D

    show cdp neighbors detail

    E

    show ip route

    F

    traceroute


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    PING命令使用了哪种ICMP消息（）。
    A

    Redirect

    B

    Source quench

    C

    Echo request和Echor eply

    D

    Destination unreachable。


    正确答案： A
    解析： 暂无解析

  • 第13题：

    常用来进行网络连通性检查的Ping命令工具,它的工作原理为()。

    A.向目标主机发送UDP Echo Request数据包，等待对方回应UDP Echo Reply数据包

    B.向目标主机发送ICMP Echo Request数据包，等待对方回应ICMP Echo Reply数据包

    C.向目标主机发送UDP Echo Reply数据包，等待对方回应ICMP Echo Request数据包

    D.向目标主机发送ICMP Echo Reply数据包，等待对方回应ICMP Echo Request数据包


    参考答案：B

  • 第14题：

    What command verifies connectivity between two hosts by sending and receiving ICMP echo messages?（）

    • A、ping
    • B、tracert
    • C、netstat
    • D、show cdp neighbors detail
    • E、show ip route
    • F、traceroute

    正确答案:A

  • 第15题：

    默认情况下，ICMP列表中（）。

    • A、不允许任何ICMP消息
    • B、允许所有ICMP消息
    • C、只允许传入的echo请求
    • D、不允许传入的echo请求

    正确答案:A

  • 第16题：

    在MSR路由器上，ping命令的-tos参数指定ICMP Echo Request报文中的ToS（Type of Service，服务类型）字段值，取值范围为0～255，默认值为（）。

    • A、46
    • B、0
    • C、63
    • D、2

    正确答案:B

  • 第17题：

    PING命令使用了哪种ICMP消息？（）

    • A、Redirect
    • B、Source quench
    • C、Echo request和Echo reply
    • D、Destination unreachable

    正确答案:C

  • 第18题：

    PING命令使用了哪种ICMP消息（）。

    • A、Redirect
    • B、Source quench
    • C、Echo request和Echor eply
    • D、Destination unreachable。

    正确答案:C

  • 第19题：

    OSPF is enabled on router A. You execute the following command on router A and receive theaccompanying output:RouterA#ping 224.0.0.5 repeat1Type escape sequence to abort.Sending 1, 1 00 - byte ICMP Echos to 224.0.0.5, timeout is 2 seconds:Reply to request 0 from 10.100.100.1, 4 ms10.100.100.1 is the IP address of a loopback interface on router A. What can you conclude about router A?（）

    • A、Only the router A loopback interface is parti cipating in the OSPF routing process
    • B、None of the router A interfaces are participating in the OSPF routing process
    • C、Router A is using the loopback interface IP address as its OSPF router ID
    • D、Router A does not have any reachable OSPF neighbors

    正确答案:D

  • 第20题：

    Which statement is true when ICMP echo and echo-reply are disabled on edge devices？（）

    • A、Pings are allowed only to specific devices.
    • B、CDP information is not exchanged.
    • C、Port scans can no longer be run.
    • D、Some network diagnostic data is lost.
    • E、Wireless devices need to be physically connected to the edge device.
    • F、OSPF routing needs the command ip ospf network non-broadcast enabled.

    正确答案:D

  • 第21题：

    What happens when you issue the ping 172.19.102.2 count 5 command?（）

    • A、ICMP echo requests are sent to 172.19.102.2 in five-millisecond intervals.
    • B、ICMP echo requests are sent to 172.19.102.2 until five packets are dropped.
    • C、ICMP echo requests are sent to 172.19.102.2 five times.
    • D、ICMP echo requests are sent continuously to 172.19.102.2 for five seconds.

    正确答案:C

  • 第22题：

    防止系统对ping请求做出回应，正确的命令是：（）。

    • A、echo0>/proc/sys/net/ipv4/icmp_ehco_ignore_all
    • B、echo0>/proc/sys/net/ipv4/tcp_syncookies
    • C、echo1>/proc/sys/net/ipv4/icmp_echo_ignore_all
    • D、echo1>/proc/sys/net/ipv4/tcp_syncookies

    正确答案:C

  • 第23题：

    单选题
    You have just configured the network interface on systemA . The following information is  From systemB， you test the network connectivity by sending ICMP ECHO_REQUEST packets to  systemA. The following message is displayed： no answer from systemA  What is most likely the problem？（）
    A

     The interface is not plumbed.

    B

     The interface is not configured.

    C

     The interface does not have valid routes configured.

    D

     The interface is not marked as


    正确答案： B
    解析： 暂无解析

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