BIM (TU) Question Paper 2014 – Data Communication & Computer Network | 2nd SEM

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Data CommunicationOld Is Gold | Tribhuvan University
Question Paper of Data Communication and Computer Network
For: BIM / Second Semester / IT 214
Year: 2071 (2014)

Full Marks: 40| Time: 2 hrs

Candidates are required to answer the questions in their own words as far as practicable.

Group ‘A’ – 1. Brief Answer Questions: [10 X 1 = 10]

i. Why signals are modulated before transmission?
ii. What are the advantages of using optical fiber?
iii. What is the purpose of piggybacking?
iv. How does ARQ corrects errors?
v. Which multiplexing is preferred in digital transmission and why?
vi. Why ARP protocol is required?
vii. What is function of TTL field?
viii. Why do you do CIDR?
ix. Which protocols and respective ports are used for sending and receiving emails?
x. List the various ranges of private IP address.

Group “B” – Short Answer Questions: [5 X 3 = 15]

2. Describe the basis model of communication.
3. What frame will be transmitted for the data D=11000011 using the divisor polynomial x3 + 1 for CRC?
4. Explain and describe NAT.
5. Differentiate between Selective Reject ARQ and Stop and Wait ARQ?
6. Describe Distance Vector routing Algorithm and differentiate it with shortest path routing algorithm.

Group “C” – Long Answer questions: [3 X 5 = 15]

7. Which random access method is used in Ethernet? Explain its working principle.
8. What is an IP address? Explain IPv4 header with diagram.
9. Which protocol does DHCP use? Explain working principle of DHCP with diagram.

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