Computer Network : Mid semester Examination ( 4th Sem )

Computer Network

Mid Semester Examination, 2021-22
B. Tech - Semester : 04
Time : 1.30 hrs. - Max. Marks : 40

Instructions:

1. All questions are Compulsory
2. Assume missing data suitably, if any.

Section : A ( 2 x 2 = 4 Marks )

All questions are compulsory

1. What are the applications and uses of computer network.
2. List any four function of data link layer.

Section : B ( 4 x 2 = 8 Marks )

All questions are compulsory

1. Compare between Hub and Switch Devices.
2. Compare flow control and error control ?

Section : C ( 6 x 2 = 12 Marks )

All questions are compulsory

1. Identify the major advantages and disadvantages of various types of guided media.
   
   -----OR-----
   Identify and explain the difference between OSI model and TCP/IP model with suitable block diagram.
2. Apply Even Parity Hamming Code method (step by step)to find the codeword of data word of 11001.
   
   -----OR-----
    Explain the concept of sliding window protocol of flow control in data link layer.

Section : D ( 8 x 2 = 16 Marks )

All questions are compulsory

1. Discuss the advantage and disadvantage of the following network typologies: Star Topology, Ring Topology, Bus Topology, and Mesh Topology.
   
   -----OR-----
   Classify and explain the various types of Multiplexing Strategies.
2. Illustrate and compare the performances of various Aloha and CSMA protocols.
   
   -----OR-----
   Discover the codeword using Cyclic Redundant Code (CRC) method for the data word 10011101 using generator polynomial g(x) = x^3+1. Suppose the third bit from the left is inverted during transmission. How will receiver detect the error?

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