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Computer Network - May 18
Computer Engineering (Semester 5)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1(a)
Explain the method to find number check bits required to correct single bit error for a
10-bit message and compute the check bits for 11100 00101.
(5 marks)
00
1(b)
Encode the message 1011111000001 using biary encoding, Manchester encoding and
differential Manchester encoding.
(5 marks)
00
1(c)
Find the shortest path between A and D using Dijkstra Algorithm.
(5 marks)
1899
1(d)
What are the different world wide unique identifiers? Explain the components of
Uniform Resource Locators.
(5 marks)
00
2(a)
Explain how a strong Generator Polynomial is formed. Give the Algorithm for computing the checksum.
(10 marks)
00
2(b)
Explain any two collision free protocols.
(10 marks)
00
3(a)
Explain the reasons for congestion in a network. Explain open loop congestion control
methods.
(10 marks)
1883
3(b)
Explain TCP IP reference model and compare it with OSI reference model.
(10 marks)
1852
4(a)
Explain how the value of 'n' is decided in an n bit sliding window protocol. Explain the
advantages of Selective repeat over go-back n protocol.
(5 marks)
1860
4(b)
Prove that the slotted ALOHA performs better than Pure ALOHA.
(10 marks)
1865
5(a)
Compare Guided media w.r.t unguided media.
(10 marks)
00
5(b)
Compare Routing protocols RIP, OSPF and BGP.
(10 marks)
1904
Q6) Write short notes on (any two):
6(a)
DNS
(10 marks)
1916
6(b)
SNMP
(10 marks)
00
6(c)
Sockets and Socket Programming.
(10 marks)
1913
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