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National Open University Exam Past Question – CIT 722 OCTOBER/NOVEMBER 2014 EXAMINATION

NATIONAL OPEN UNIVERSITY OF NIGERIA CIT 722 Computer Networks

14-16 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS SCHOOL OF SCIENCE AND TECHNOLOGY OCTOBER/NOVEMBER 2014 EXAMINATION

 

 

COURSE CODE: CIT 722

COURSE TITLE: Computer Networks

TIME ALLOWED: 3 Hours

INSTRUCTION: Answer any five (5) questions.

 

 

 

1a.        List the geometric representations of computer networks, and explain any three taking into considerations the merits and demerits of each?                                                                        10 marks

 

1b. What is Multiplexing? 4 marks
 

 

2a.

 

 

Explain different areas where networking can be applied.

 

 

10 marks

 

2b.

 

Explain the key elements of a protocol.

 

4 marks

 

 

3a.

 

3b.

 

 

List and explain types of networks?

 

What protocol is used by DNS name servers?

 

 

10 marks

 

4 marks

 

 

 

4a.        In considering a computer network there are key issues that should be considered, list and explain five of these issues.                                                                                                              10 marks

 

4c.         What is addressing designed to achieve?                                                                       4 marks

 

 

 

 

5a.        list five characteristics of a file server?                                                                    10 marks

 

 

 

5b.        What is a file server?                                                                                                4 marks

 

 

 

 

6a.    List five types of standard protocols explain stating the advantages and disadvantages. 10 marks

 

6b.    List four basic properties of protocols                                                                                 4 marks

 

 

 

 

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