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National Open University Exam Past Question – CIT 305 MAY/JUNE 2012 EXAMINATION

NATIONAL OPEN UNIVERSITY OF NIGERIA

1416 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS SCHOOL OF SCIENCE AND TECHNOLOGY

MAY/JUNE 2012 EXAMINATION

 

 

CIT 305  Networking And Communication Technology (3 Credits) Time allowed: 3HRS

Instruction: Answer 5 Questions

 

QUESTION 1

1a. What is Networking? (6 marks)

 

1b. Write short note on

  • InterNetwork
  • Backbone Network

(4 marks each)

1c. List and Explain three types of Networks based on their physical scope (6 marks)

  1. What do you understand by the term “Data Link” (4 marks)

2b. List and Explain any five (5) types of Data Links (10 marks)

2c. List 3 purpose of computer  networks (6 marks)

 

3a. Define Network Protocol? (4 marks)

3b. List three types of Network protocols (6 marks)

3c. What is the full meaning of the following acronyms:

(i) ATM  
(ii) CSMA
(iii) WAN
(iv) MAN
  WWW (2 marks each)

 

4a. What is DSL? (5 marks)

4b. List any three (3) benefits of DSL (9 marks)

4c. List three (3) features of DSL (6 marks)

 

5a. What do you understand by Enterprise Network? (5 marks)

5b. Discuss the differences between  the LAN and the WAN classes.(9 marks)

5c. List three types of Enterprise Network (6 marks)

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6a.Write briefly on the following

(i)  A modem

.(ii) Modulation

(4 marks each)

6b.Describe Packet  switching (6 marks)

6c. List three advantages of Packet  switching (6 marks)

 

7a.        (i) What is ISDN? (ii) What are the components of ISDN? (6 marks)

 

7b.        (i) What do you understand by the word “multiplexer”(ii)  list three types of Multiplexing

(8 marks)

 

7c. What are the differences between  the digital and the analog signals (6 marks)

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