STUPIDSID
Answer the following briefly:
1 (a)
Distinguish between Logical Addressing. Physical Addressing and Port addressing. Give an example for each type. Also name the layer at which each of them operate.
5 M
1 (b)
What are transmission impairments? Explain each briefly. Which transmission medium is better as a communication channel and why?
5 M
1 (c)
Explain the working of TSI Switch.
5 M
1 (d)
Compare TCP and UDP.
5 M
1 (e)
What is meant by data transparency? How s it implemented in HDLC? Give an example.
5 M
2 (a)
Explain the need for layered architecture. Explain TCP/IP, mentioning the functions of each layer. Also mention the Protocols for each layer.
10 M
2 (b)
Explain the functions of each of these interconnecting devices: Hubs, Repeaters, Switches, Bridges, Routers and Gateways.
10 M
3 (a)
Consider that Primary station A, is intending to set uo communication link in normal response mode with two secondary Stations, B and C. Which frames are exchanged between Primary and Secondary stations for the following situations? Show with frame flow diagram, the following sequence:
i) Primary A wants to set up a normal response mode with secondary stations B and C and both stations B,C send an positive Acknowledgement frame to A.
ii) Station A wants to know whether B and C have some data to send to Primary and in response B sends 2 data frames, while C indicates that it has no data to send.
iii) Primary station sends acknowledgement to B for the data received.
iv) Primary sends 'Select' command to Band 'C' to check whether any stations is ready to receive the data. B indicates that it is Busy and not ready, while C indicates it is ready to receive the data.
v) Primary sends 3 data frames to C and C sends positive acknowledgement to A.
i) Primary A wants to set up a normal response mode with secondary stations B and C and both stations B,C send an positive Acknowledgement frame to A.
ii) Station A wants to know whether B and C have some data to send to Primary and in response B sends 2 data frames, while C indicates that it has no data to send.
iii) Primary station sends acknowledgement to B for the data received.
iv) Primary sends 'Select' command to Band 'C' to check whether any stations is ready to receive the data. B indicates that it is Busy and not ready, while C indicates it is ready to receive the data.
v) Primary sends 3 data frames to C and C sends positive acknowledgement to A.
10 M
3 (b)
What is meant by error control? Show, with flow diagrams, how error control is implemented in each ARQ technique for the following situations:
i) lost or damaged frames,
ii) delayed acknowledgements and
iii) lost or damaged acknowledgements.
i) lost or damaged frames,
ii) delayed acknowledgements and
iii) lost or damaged acknowledgements.
10 M
4 (a)
What is meant by 'blocking' in circuit switching networks? Bring out the advantages of multi stage space division switching over single stage switching.
i) Sketch a 3-stage Space division switch wit N=15, group size of n=5, K=2, what is the condition required to make it non-blocking?
ii) For the same specifications sketch three-stage TST switch using TSI modules.
i) Sketch a 3-stage Space division switch wit N=15, group size of n=5, K=2, what is the condition required to make it non-blocking?
ii) For the same specifications sketch three-stage TST switch using TSI modules.
10 M
4 (b)
Explain ADSL with respect to channel configuration and modulation technique. Compare the different DSL technologies.
10 M
5 (a)
Explain LAN Protocol architecture with reference to IEEE 802. Sketch the frame format of MAC Sub-layer and explain the functions of each field.
10 M
5 (b)
What is the difference between Congestion Control and Flow control? Explain congestion control methods.
10 M
6 (a)
Compare Circuits switching, Datagram switching and Virtual circuit Packet switching.
10 M
6 (b)
Apply Dijkstra's algorithm to given network to find the least cost path from node 4 to all other nodes (state the steps in the algorithm).
10 M
Write short notes on (any four):
7 (a)
ISDN
5 M
7 (b)
Piggybacking with an example
5 M
7 (c)
Berkeley API.
5 M
7 (d)
SONET / SDH
5 M
7 (e)
LAN topologies.
5 M
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