ICMP Quiz (Online)

1.  

What is the header size of ICMP Packet?

2.  

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?

3.  

Which ICMP message is sent by a host in the network to test connectivity with another host?

4.  

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

5.  

When you use the ping command to send ICMP messages across a network, what’s the most common request/reply pair you’ll see

6.  

Which port number does ICMP use?

7.  

The network administrator at ATECH issues the ”#ping 10.0.0.99” command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?

8.  

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?

9.  

Which statement is NOT true regarding ICMP?

10.  

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