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ICMP is primarily used for __________(a) error and diagnostic functions(b) addressing(c) forwarding(d) routingI have been asked this question in class test.My enquiry is from Network Layer in chapter OSI Model of Computer Network

Answer»

Right choice is (a) error and diagnostic functions

To explain: ICMP abbreviation for Internet CONTROL MESSAGE Protocol is used by networking devices to send error MESSAGES and operational information indicating a host or router cannot be reached. ICMP OPERATES over the IP packet to provide error reporting functionality as IP by itself cannot report errors.



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