Question: 2. Why are the protocol layers required in network communication? Draw the 7-layer ISO protocol stack and discuss the functionalities of each layer. Indicate the

2. Why are the protocol layers required in network communication? Draw the 7-layer ISO protocol stack and discuss the functionalities of each layer. Indicate the missing layers in TCP protocol suite and discuss how they are taken care of. (7x1/2 + 11/2 = 5 Points)
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