CIT722 : COMPUTER NETWORKS (2014)

NATIONAL OPEN UNIVERSITY OF NIGERIA

14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS

SCHOOL OF SCIENCE AND TECHNOLOGY

MARCH/APRIL 2014 EXAMINATION

COURSE CODE: CIT 722

COURSE TITLE: COMPUTER NETWORKS

TIME ALLOWED: 3HOURS

INSTRUCTION: Answer Any Five Questions

1a. What do you understand by network topology? 4 marks

b. What is Multiplexing? 4 marks

c. Name the three categories of Multiplexing 3 marks

d. Distinguish between Time and Latency? 3 marks

2a. What is Protocol. 2 marks

b. Explain the key elements of a protocol. 9 marks

c. What is the advantage of token passing protocol over CSMA/CD protocol? 3 marks

3a. List and explain types of networks? 10 marks b. What protocol is used by DNS name servers? 4 marks

4a. Explain IP addressing 6 marks

b. List the two IP addressing schemes 4 marks

c. What is addressing designed to achieve? 4 marks

5a. List the layers of OSI Model 4 marks

b. At which layer of the OSI Model are network support layers? 3 marks

c. What are the two types of transmission technology available? 2 marks

d. What is subnet? 2 marks

e. Differentiate between communication and transmission? 3 marks

6a. State the possible ways of data exchange. 3 marks

b. Distinguish between NETBIOS and NETBEUI. 5 marks

c. What is a MAC address? 3 marks

d. Differentiate between bit rate and baud rate. 3 marks

7. Briefly discuss four different types of networking / internetworking devices. 14marks

For the 2015 – till date past questions for this course CLICK HERE

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