Enrollment No. ...........
END TERM EXAMINATION
THIRD SEMESTER (BCA) JANUARY 2024
Paper Code: BCA-201
Subject: Computer Networks
Time: 3 Hours
Maximum Marks: 75
Note: Attempt five questions in all including Q.No.1 which is compulsory.
- Q1. Attempt any five of the following: (5x5=25)
- (a) Define the Networks and Discuss various Networks Criteria? 5
- (b) Compare TCP and UDP protocols. 5
- (c) Define Piggybacking and specify its benefit. 5
- (d) Write a short note on Modems. 5
- (e) Differentiate between Bridges and Routers. 5
- (f) In reference to UDP, what is the role of Pseudoheader and the Length field? 5
- (g) What is bit stuffing and byte stuffing? 5
- (h) Compare and contrast the different Unguided transmission media. 5
UNIT-I
- Q2. (a) Explain layered architecture ? Explain the OSI model in brief. 6.5
- (b) Explain LAN , WAN , MAN . 5
- Q3. (a) Discuss the topologies in detail with examples. 7.5
- (b) Explain the Shannon Capacity Theorem. 5
UNIT-II
- Q4. (a) Given a 10 bit sequence 1011101110 and divisor of 1011, find the CRC and check your answer. 6.5
- (b) What is understood by Flow Control? Explain any one Sliding Window ARQ protocol with diagrams and example. 6
- Q5. (a) Discuss the Sliding window protocols specify its advantages over its stop and wait protocols. 6.5
- (b) Distinguish the following: i) Synchronous and Asynchronous TDM ii) Circuit switching and Packet switching. 6
UNIT-III
- Q6. Explain the process of Distance vector routing with an example. Explain when the sharing happens and how routing tables are exchanged between routers. 12.5
- (b)--------------- What is multiplexing? Explain any one flow control algorithm. 6.5
- Q7. (a) A multiplexer combines four 100-Kbps channels using a time slot of 2 bits. Show the output frame duration, frame rate, link utilization for arbitrary inputs. Calculate Frame size, Frame rate, Frame duration, rate link. 5
- (b) What is understood by Classful addressing? Explain. What is its disadvantage? 7.5
UNIT-IV
- Q8. (a) Explain the functions and protocols of the Transport Layer. 7.5
- (b) Explain Connection Management in reference to Transport Layer. 5
- Q9. Explain the Functions of Session layer, Presentation layer and Application layer. 12.5