Computer Networks | Nagpur university | Sum-17


B.E. Sixth Semester (Information Technology) (C.B.S.)

Computer Network

Time : Three Hours
Max. Marks : 80
Notes : 1. All questions carry marks as indicated.
2. Solve Question 1 OR Questions No. 2.
3. Solve Question 3 OR Questions No. 4.
4. Solve Question 5 OR Questions No. 6.
5. Solve Question 7 OR Questions No. 8.
6. Solve Question 9 OR Questions No. 10.
7. Solve Question 11 OR Questions No. 12.
8. Illustrate your answers whenever necessary with the help of neat sketches.

1. a) Explain about Infrared Transmission.    [05 M]

b) Explain the following with example.   [08 M]
i) Reliability.
ii) Packet loss rate.
iii) Jitter.
iv) Through Put.


2. a) Write a short note on Wireless transmission.    [06 M]

b) Discuss about IEEE 802.11 and its architecture.    [07 M]

3. a) Explain about selective repeat ARQ. With its working.    [07 M]

b) Write a short note on 1-bit sliding window protocol.    [06 M]


4. a) Write a short note on CSMA/CA with an example.    [07 M]

b) Explain about static and Dynamic channel allocation.    [06 M]

5. a) Explain about distance vector routing with its working.    [08 M]

b) Write a short note on BGF.   [06 M]


6. a) Explain the difference between Default mask and subnet mask.    [03 M]

b) Explain the difference between Subnet mask and supernet mask with example.    [03 M]

c) Explain about transition from IPV4, to IPV6.    [08 M]

7. a) Explain the concept of flow control and buffering.    [06 M]

b) Define socket, explain it with socket system calls.    [07 M]


8. a) Explain the concept of multiplexing with example.    [07 M]

b) Explain about quality of service under transport layer.    [06 M]

9. a) What is DNS? Explain with its resolutions.    [06 M]

b) Explain the packet format of DHCP.    [04 M]

c) Discuss about FTP.    [03 M]


10. a) Explain about DNS in the internet.    [05 M]

b) Explain about file transfer in TFTP.    [08 M]

11. a) Write a short note on mobile IP.    [08 M]

b) Explain about Ipsec.    [03 M]

c) Write a short note on Internet security.    [03 M]


12. a) Briefly describe about transport layer security.  [09 M]

b) Explain about Real Time traffic over the internet.  [05 M]


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