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Host 1 sends an ICMP echo reques

题目

Host 1 sends an ICMP echo request to remote sever1. Layer2 header of the frame containing the ping packet（）。

  • A、The IP address of sever 1.
  • B、The MAC address of NIC in sever 1.
  • C、The IP address of F0/0 interface of router R1.
  • D、The MAC address of the Fa0/0 interface of router R1.
  • E、The IP address of the s0/0/0 interface of router R2
  • F、The MAC address of the s0/0/0 interface of router R2
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相似问题和答案

第1题：

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


正确答案：A

第2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.


参考答案：C

第3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


参考答案：A

第4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5题：

Host1正在试图和Host2联系。RouterC的e0接口是down的,以下选项正确的是?()

A.RouterC会使用ICMP通知Host1&ldquo；Host2无法到达&rdquo；

B.RouterC会使用ICMP通知Host1&ldquo；Host1无法到达&rdquo；

C.RouterC会使用ICMP通知Host1，RouterA和RouterB&ldquo；Host2无法到达&rdquo；

D.RouterC会发送一个&ldquo；DestinationUnreachable&rdquo；的消息类型

E.RouterC会发送一个&ldquo；RouterSelection&rdquo；的消息类型

F.RouterC会发送一个&ldquo；SourceQuench&rdquo；的消息类型


参考答案：A, D

第6题：

Click the Exhibit button.A user logs in, is assigned the default role, and successfully loads the Host Enforcer policies shown in the exhibit.Which three statements are true? ()

A. The local host will respond to ICMP echo-request packets from 192.168.53.10.

B. The local host will respond to UDP port 53 requests from 192.168.1.25.

C. The local host can send any packet of any type to host 172.16.1.1.

D. The local host will accept any packet of any type from host 172.16.1.1.

E. The local host can send packets to UDP port512 on server 192.168.53.10.


参考答案：A, C, D

第7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8题：

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


正确答案：A
解析：Explanation:TheICMPprotocolusesEchorequestandEchoreplywiththePingcommand.ThePINGutilityisthemostcommonlyusedmessagetoverifyconnectivitytoaremotedevicewithinthenetwork.

第9题：

Host 1 has just started up and requests a web page from web server 2. Which two statements describe steps in the process Host 1 uses to send the request to web server 2 (choose two)（）。

  • A、Host 1 addresses the frames to the MAC address of router R1
  • B、Host 1 looks in its ARP cache for the MAC address of router R1
  • C、Host 1 addresses the frames to the MAC address of web server 2
  • D、Host 1 sends the packets to router R1 to be forwarded to web server 2
  • E、Host 1 sends a broadcast ARP request to obtain the MAC address of webserver2

正确答案:C,E

第10题：

Echo sounder sends a（） (无线电信号)from the bottom of the ship to the seabed.

  • A、radio signal
  • B、radio wave
  • C、signal
  • D、signal radio

正确答案:A

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