54216-mt----high Speed Networks

NR

Code No: 54216/MT

M.Tech. – II Semester Regular Examinations, September, 2008 HIGH SPEED NETWORKS (Common to Digital Systems & Computer Electronics/ Digital Electronics & Communication Systems) Time: 3hours

Max. Marks:60 Answer any FIVE questions All questions carry equal marks ---

1.a) b)

What are different network mechanisms? Explain. Explain on what factors the quality of service depends.

2.a)

Explain “frame format” “frame routing” and “frame relay” with schematic diagrams. Use the setting up of an ISDN circuit switched call to explain the function of the various signaling protocols that operate over the D channel.

b)

3.a) b)

Explain about various virtual channel ID numbers and their circuit number assignment. Explain what is understood by the following terms used in relation to packet switched data networks: i) Datagram ii) Virtual call (circuit) iii) Logical channel.

4.a) b)

Explain about “ATM adaptation layer”. Discuss the different methods of error detection in each of the Application adaptive layer.

5.a)

Describe some of the factors that need to be considered in connecting networks. Explain “cross bar switch”.

b) 6.

Explain the use of the “folding algorithm” in rearrangeable networks. Explain its structure. Contd…2

Code No: 54216/MT

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7.

Explain the role of user network interface (UNI) between user and the wide area ATM network.

8.

Produce a sketch of a frame transmitted on a LAN that shows the relative position of MAC, IP, TCP/UDP and application protocol control information. *****