ICMP protocol - Definition - Networking

Q.  Which protocol is mostly used to send unknown messages back from a destination network to an originating host?
- Published on 27 Aug 15

a. TCP
b. UDP
c. BootP
d. ICMP

ANSWER: ICMP

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    Discussion

  • Prajakta Pandit   -Posted on 21 Oct 15

    ICMP :

    - ICMP (Internet Control Messaging Protocol) is an addition to Internet Protocol to carry error, routing and control messages and data.

    - It is also considered as a protocol of the network layer.

    - ICMP is mostly used to send unknown messages back from a destination network to an originating host.

    - It differs from transport protocols such as TCP and UDP. It is not used to exchange data between systems.

    - It can provide hosts with information about network problems and encapsulated within IP datagrams.

    - ICMP has error reporting mechanism.

    - It provides a mechanism for host and management queries.

    - The ICMP can diagnose some of the network problems and such a diagnosis is accomplished through the query messages

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