Basic CS-Networks [Redpine Infotech Placement]: Sample Questions 3 - 3 of 3

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Question 3


Describe in Detail


What is the use of ICMP in TCS/IP stack?


Understanding of ICMP
  • ICMP is a supporting protocol in the internet protocol suit.
  • Used by network devices, including routers, to send error messages and operational information.
  • ICMP differs from transport protocols such as TCP and UDP- it is not typically used to exchange data between systems.
  • For example, the ping command in a TCP/IP application- sends an “echo” packet to a specified server machine via the ICMP protocol.
  • TCP/IP protocol stack is first layer introducing virtual network abstraction.
  • Physical implementation details are hidden under the IP layer.

IP Layer

  • Provides connection-less delivery system.
  • If errors occur in the physical layer- IP protocol guarantees transmission is terminated successfully.
  • A connection oriented reliable branch and a connection-less unreliable branch both join on top of the internet protocol.

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