NALANDA OPEN UNIVERSITY QUESTION (2017) BCA, PART- III , Paper- XV ( Computer networks)

NALANDA OPEN UNIVERSITY QUESTION (2017) BCA, PART- III , Paper- XV ( Computer networks)

                                                                       2017
                                                                Time: 3 hours
                                                                Full Marks: 80
                                    Answer any five questions. All questions carry equal marks.

1. What is networking? Why it is important? Discuss different types of networking.

2. What are the devices used at network layer? Describe the functions and congestion control algorithms of network layer.

3. Discuss the topologies of network layer with diagram. Give examples for each topologies.

4. Explain the different types of transmission  modes with examples.

5. What is multiplexing? Explain different types of multiplexing with examples of each type.

6. Differentiate between presentation layer and application layer.

7. Why security important in networking? Discuss various network securities.

8. What is ATM? Discuss various layers of ATM? Also discuss the advantages of using ATM.

9. Explain different protocols of Data link layer. How data link layer different from Transport layer?

10. Write short notes on:
       a) Hub and Switch
       b) Bandwidth
       c) Error detection
       d) Connection -less service