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The process of error checking and dropping of the header, delivering messages to appropriate process based on port number is called as _______

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The process of error checking and dropping of the header, delivering messages to appropriate process based on port number is called as _______

(a) Delivery of packets

(b) Error correction

(c) Multiplexing

(d) Demultiplexing

This question was addressed to me in an interview.

My question is taken from P2P Applications in section TCP/IP Protocol Suite of Computer Network

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The correct answer is (d) Demultiplexing

Easiest explanation: Demultiplexing is the process of error checking and dropping of the header, delivering messages to appropriate process based on port number. The transport layer does this on the receiver’s end after the packet is received and takes help of the header attached by the sender’s side transport layer during multiplexing.

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