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Which statement is false?

  1. PING is a TCP/IP application that sends datagrams once every second in the hope of an echo response from the machine being PINGED
  2. 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
  3. If PING encounters an error condition, an ICMP message is not returned
  4. PING display the time of the return response in milliseconds or one of several error message
in Computer Networks by Veteran (105k points) | 2.4k views

4 Answers

+18 votes
Best answer

Ans:C

by Junior (589 points)
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+3
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+7 votes
PING uses ICMP to check connectivity of host to Internet(IP) layer. It send message to host computer to destination computer and then echoed back from destination to host computer. It also checks RTT. So, If it is not echoed back then there must be some error
by Veteran (119k points)
0
So how is C false?
0
seems all r correct
0
In case of ICMP error it gives information about the packet loss means ICMP returned but obtion C says ICMP not retunred.Hence it is FALSE.
+6 votes

answer is : Option C

In case of error, the target host or an intermediate router sends back an ICMP error message, for example "host unreachable" or "TTL exceeded in transit".


Try once more....definitely you can

by Loyal (8.1k points)
+6 votes

Answer : If PING encounters an error condition, an ICMP message is not returned

by Boss (45.4k points)
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