BCS-041
1.(a) Explain
the switching techniques used in ATM. Draw and explain structure of ATM cell
format. (6 Marks)
(b) What is a sub-netting and super-netting? How do you implement
sub-netting? Explain this with an example. (6 Marks)
(c) Explain the CSMA/CD Protocol with collision detection with the
help of a diagram. (4 Marks)
(d) What is the remainder obtained by dividing x7+x5+1
by the generator polynomial x3
+1? (4 Marks)
2.(a) Explain
with the help of an example/illustration the problem with Distance vector
routing algorithm. Explain in detail how does link state routing algorithm
resolve the shortcoming of the above algorithm. (8 Marks)
(b) Television channels are 8 MHZ wide. How many bits/sec can be
sent if 8 level digital signals are used? Assume that this channel is
noiseless. (2 Marks)
(c) Describe and explain the throughput expression of Aloha and
Pure Aloha. Consider the delay of Pure Aloha vs Slotted Aloha. Where will be
less delay ? Justify. (8 Marks)
(d) A bit string 0111110111010111110 needs to be transmitted at
the Data-Link layer. What is the string actually transmitted after bit
stuffing. (2 Marks)
3.(a) Analyze
your computer lab in your study centre or college (in guidance of your teacher/
coordinator)and perform the following tasks:
i) Draw diagram
of your lab consisting of nodes (computers), hubs, switches bridges, type of
cabling, servers and other various network devices. (4 Marks)
ii) Describe the
network topology and its implementation in the lab. (3 Marks)
iii) Number of
ports of the hub(s) with specifications. (2 Marks)
iv) Describe
configuration / features of the server machine. (3 Marks)
v) List of
applications running on the network with their brief description. (2 Marks)
vi) Describe
briefly about the speed of the LAN and the protocol. (2 Marks)
vii) Describe the
specification of cable used and its length. (2 Marks)
viii) Describe the
networking features of the server operating system. (2 Marks)
4.(a) Draw the
wireless LAN architecture and explain its components? Explain the functioning
of the various wireless LAN Protocols? (6 Marks)
(b) Explain the following in the context of Transport Layer:
·
Addressing scheme
·
Flow control and
Buffering schemes (8 Marks)
(c) List different types of transmission media used in data
communications. Write one advantage and one disadvantage of each. (4
Marks)
(d) Explain the terms Bandwidth, Channel, Frequency, Amplitude
used in Data Communication. (2 marks)
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