Question Bank - Computer Networks

Here's the question bank on all the computer networks topics.

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Which statement is false?

A.
PING is TCP/IP application that sends datagrams once every second in the hope of an echo response from the machine being PINGED
B.
If the machine is connected and running a TCP/IP protocol stack, it should respond to the PING datagram with a datagram of its own
C.
If PING encounters an error condition, an ICMP message is not returned
D.
PING display the time of the return response in milliseconds or one of several error message

Solution:

The correct answer is "option 3".CONCEPT:The ping measure Round-trip time for the messages, that are echoed back to the source, sent from source host to destination host.Ping is used to test the reachability of any host on an Internet protocol(IP) network.Ping works by sending Internet Control Message Protocol(ICMP) echo request packet & waits for ICMP echo reply by the target host.When ping encounters any error, ICMP sends the error messages & some of them are:Destination Host UnreachableRequest timed outPing request could not find a hostHence, the statement "If PING encounters an error condition, an ICMP message is not returned" is false.

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