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If the value in protocol field is 17, the transport layer protocol used is _____________

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If the value in protocol field is 17, the transport layer protocol used is _____________

(a) TCP

(b) UDP

(c) ICMP

(d) IGMP

I had been asked this question during an interview.

The doubt is from IPv4 topic in division TCP/IP Protocol Suite of Computer Network

1 Answer

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Correct choice is (b) UDP

Explanation: The protocol field enables the demultiplexing feature so that the IP protocol can be used to carry payloads of more than one protocol type. Its most used values are 17 and 6 for UDP and TCP respectively. ICMP and IGMP are network layer protocols.

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