ICMP Quiz (Online)

1.  

For security reasons, the Cisco network administrator needs to prevent pings into the corporate networks from hosts outside the internetwork. Using access control lists, which protocol should be blocked?

2.  

What statement is true regarding ICMP packets?

3.  

What is the companion of the Internet Control Message Protocol (ICMP)?

4.  

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

5.  

Which function does IP SLA ICMP ECHO operation perform to assist with troubleshooting?

6.  

Which two fields in the ICMP header is used for identifying the intent of ICMP message?

7.  

An administrator issues the command “#ping 127.0.0.1” from the command line prompt on a PC host named ATECH1. If an ICMP reply is received, what does this confirm?

8.  

What are the Echo-request and echo-reply messages designed for?

9.  

Which port number does ICMP use?

10.  

You execute the ping command from a host, but the router does not have a path to its destination. Which of the following ICMP message types will a client receive from the router?