BCS-041-SOLVED ASSIGNMENT 2016-2017 IGNOU BCA 4th SEM

1.

(a)

Explain the switching techniques used in ATM. Draw and explain structure of ATM cell format.

(b)

What is a sub-netting and super-netting? How do you implement sub-netting? Explain this with an example.

(c)

Explain the CSMA/CD Protocol with collision detection with the help of a diagram.

(d)

What is the remainder obtained by dividing x7+x5+1 by the generator polynomial x3 +1?

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.

(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.

(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.

(d)

A bit string 0111110111010111110 needs to be transmitted at the Data-Link layer. What is the string actually transmitted after bit stuffing.

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.

(ii) Describe the network topology and its implementation in the lab.

(iii) Number of ports of the hub(s) with specifications.

(iv) Describe configuration / features of the server machine.

(v) List of applications running on the network with their brief description.

(vi) Describe briefly about the speed of the LAN and the protocol.

(vii) Describe the specification of cable used and its length.

(viii) Describe the networking features of the server operating system.

4.

(a)

Draw the wireless LAN architecture and explain its components? Explain the functioning of the various wireless LAN Protocols?

(b)

Explain the following in the context of Transport Layer: Addressing scheme Flow control and Buffering schemes

(c)

List different types of transmission media used in data communications. Write one advantage and one disadvantage of each.

(d)

Explain the terms Bandwidth, Channel, Frequency, Amplitude used in Data Communication.

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