Question: a . Using block diagrams, compare the TCP / IP and OSI layer models, then, explain the main function of any three layers of the

a. Using block diagrams, compare the TCP/IP and OSI layer models, then, explain the main function
of any three layers of the OSI model. [10 marks]
b. List the two packet switching techniques, then compare their principle of operation and provide
an example for each type

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