Which of the following statements could be valid with respect to the ICMP (Internet Control Message Protocol)?   a. It reports all errors which occur during transmission. b. A redirect message is used when a router notices that a packet seems to have been routed wrongly. c. It informs routers when an incorrect path has been taken. d. The "destination unreachable" type message is used when a router cannot locate the destination.

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Q: The DiffServ field in the IP header is used for implementing Differentiated

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Types Of Protocols

A network protocol is a collection of rules that governs the exchange of data between devices connected to the same network. In other words, network protocols are rules that specify how devices communicate or transfer data over a network. The sender and receiver systems must obey the standards to facilitate communication between them.