GTU Information Technology (Semester 4)
Data Communication & Networking
June 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Write a short note on protocols, standards and standards organizations.
7 M
1 (b) What is network topology? Explain different network topologies with example and compare them with each other.
7 M

2 (a) Write a detailed note on TCP/IP protocol suite.
7 M
2 (b) (i) What are the differences between a port address, a logical address, and a physical address?
3 M
2 (b) (ii) List out and explain in brief various types of transmission impairments.
4 M
2 (c) Give complete classification of signals according to different criteria. Also explain each flavor in brief with necessary waveforms.
7 M

3 (a) Classify various types of transmission media and explain any two of them in detail.
7 M
3 (b) What is error detection? List various methods of error detection and explain any two of them in brief.
7 M
3 (c) What is Multiplexing? Explain Time division multiplexing and Frequency division multiplexing.
7 M
3 (d) What do you mean by forward error correction? Explain the same with the help of one coding example.
7 M

4 (a) What is analog-to-analog conversion? Explain any two techniques for analog-to- analog conversion in detail.
7 M
4 (b) Explain the function of DTE and DCE with example. Explain Null Modem in detail with diagram.
7 M
4 (c) What is digital-to-analog modulation? Explain any two techniques for digital-to- analog conversion in detail.
7 M
4 (d) Explain the following LANs in brief with suitable diagrams:
1. Token ring, 2. Token bus
7 M

5 (a) List out various routing algorithms and explain any two in brief.
7 M
5 (b) Name different implementations for baseband 10-Mbps Ethernet. Explain each one in brief.
7 M
5 (c) List and explain different networking and inter-networking devices in brief with necessary diagrams.
7 M
5 (d) List out the upper OSI layers and explain the duties performed by each layer.
7 M



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