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Header size of the ICMP message is _________(a) 8-bytes(b) 8-bits(c) 16-bytes(d) 16-bitsThe question was posed to me at a job interview.This intriguing question originated from ICMP in section TCP/IP Protocol Suite of Computer Network

Answer»

Right option is (a) 8-bytes

To explain I WOULD say: An ICMP message has an 8-byte header and a variable size data section. Out of the 8 bytes, the first 4 bytes are of a fixed format having the TYPE, code and checksum FIELDS and the next 4 bytes depend upon the type of the message.


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