Homework 2 Solution

    1. Why is it necessary to have layering in a network? What is data encapsulation in computer networking?






    2. What are the five layers in the Internet protocol stack? What are the principal responsibilities of each of these layers?








    3. Describe multiplexing and demultiplexing in transport layer.





    4. What is the difference between segment and datagram?





    5. What are the types of addresses (identifiers) used in each of the following layers? 
    a) Application layer
    b) Network layer
    c) Data-link layer