Question Paper: Computer Network Question Paper - May 17 - Computer Engineering (Semester 5) - Mumbai University (MU)
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Computer Network - May 17

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) Enumerate the main responsibilities of the data link layer.
(5 marks) 1873

1(b) What are the different guided and unguided transmission media?
(5 marks) 1858 1859

1(c) Explain with examples the classification of IPV4 addresses.
(5 marks) 1896

1(d) Compare and contrast a circuit switching and a packet switching network.
(5 marks) 00

2(a) Consider a message represented by the polynomial M(x) = x 5 +x 4 +x. Consider a 10 generating polynomial G(x) = x 3 + x 2 + 1 (1101). Generate a 3 bit CRC and show what will be the transmitted frame. How is the error detected by CRC?
(10 marks) 00

2(b) What is ISO-OSI reference model ? Compare it with TCP/IP reference model. Which layer is sued for the following:

  • i) to route packets
  • ii) to convert packets to frame
  • iii) to detect and correct errors
  • iv) to run services like FTP, TELNET etc.
(10 marks) 1846 1848

3(a) Explain Distance Vector Routing. What are its limitations and how are they overcome?
(10 marks) 1889

3(b) What are congestion prevention policies? Explain Congestion Control in Virtual Circuit and Datagram Subnets
(10 marks) 1887

4(a) With the help of suitable example explain sliding window protocol with selective reject. Compare its performance to sliding window with Go-back-n technique.
(10 marks) 1868

4(b) Explain with the help of suitable diagram TCP connection management and release.
(10 marks) 1910

5(a) Explain 1-persitent, p-persistent and 0-persistent CSMA giving strong and weak points of each.
(10 marks) 1861

5(b) What is subnetting? Given the class C network 192.168.10.0, use the subnet mask 255.25.255.192 to create subnets and answer the following:

  • i) What is the number of subnets created?
  • ii) How many hosts per subnet?
  • iii) Calculate the IP address of the first host, the last host and the broadcast address of each subset.
(10 marks) 1893 1898

Q6) Write a short notes on:

6(a) SNMP and MIB
(7 marks) 00

6(b) Bluetooth Architecture
(7 marks) 00

6(c) Border Gateway Protocol
(7 marks) 1885 1918

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