CSIT 4th Semester
Computer Networks Board Question Paper 2082 Old Course

CSC 263-2082 ✡
Tribhuvan University
Institute of Science and Technology
2082
✡
Bachelor Level/Second Year/Fourth Semester/Science
Computer Science Information Technology (CSC 263)
(Computer Networks)
(Old Course)
Full Marks:60 Pass Marks:24 Time:3 hours

Candidates are required to give their answers in their own words as for as practicable.
The figures in the margin indicate full marks

Section A
Long Answer Questions
Attempt any Two question.
[2x10=20]
1.

An organization is granted the block 192.168.0.0/18. The administrator wants to create 128 subnets. Find the following:
a. The subnet mask
b. The number of addresses in each subnet
c. The first and last addresses in subnet 1
d. The first and last addresses in subnet 128

2.

Explain different channel allocation techniques with a suitable example.

3.

Define TCP. Explain the phases of connection-oriented transmission in TCP with required figures.

Section B

Attempt any Eight questions

[8x5=40]
4.

Describe the Stream Control Transmission Protocol. List two of its advantages and disadvantages.

5.

Compare and contrast the following email protocols: SMTP, POP3, and IMAP.

6.

Explain the concept of ports and sockets in the Transport Layer.

7.

What are router ACLs and how do they improve network security?

8.

Explain the working principle of CSMA/CD used in Ethernet networks.

9.

Explain the role of protocols and standards in computer networks.

10.

Differentiate between circuit switching and packet switching.

11.

List some features of IPv6. Explain the need for transitioning from IPv4 to IPv6.

12.

Write short notes on
a) LAN
b) CRC