Question: a) Explain the purpose and operation of the ICMP protocol. Provide examples of two simple command line applications that use this protocol. Why is it

a) Explain the purpose and operation of the ICMP protocol. Provide

a) Explain the purpose and operation of the ICMP protocol. Provide examples of two simple command line applications that use this protocol. Why is it that an ICMP packet does not have source and destination port numbers? 7 MARKS b) Why does UDP exist? Would it not have been possible to just let user processes send raw IP packets? What types of application typically use UD instead of TCP? 6 MARKS

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