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National Open University Exam Past Question – CIT 311 OCTOBER/NOVEMBER 2014 EXAMINATION

NATIONAL OPEN UNIVERSITY OF NIGERIA

1416 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS SCHOOL OF SCIENCE AND TECHNOLOGY OCTOBER/NOVEMBER 2014 EXAMINATION

 

COURSE CODE:     CIT 311

COURSE TITLE:    COMPUTER NETWORKS CREDIT UNIT:        3CREDIT UNITS

TIME:                        3 HOURS

INSTRUCTION:      ANSWER ANY FOUR QUESTIONS IN ALL

 

1a.        What is Computer network                                                                            [5 marks]

1b.       Write short note on geographical coverage classification of Networks and give one

example each                                                                                                  [12.5 marks]

 

2a        Write short note on the Goals/Motivation of Computer Network [10 mark]

2b.       Enumerate the three characteristics of LANs that distinguished it from other kinds of networks:

 

3a.       What is Packet switched network                                                                  [7.5 marks]

3b.       Write short note on the two types of Network                                               [10 marks]

 

4a.       What is a digital signal                                                                                   [5.5 marks]

4b.       Differentiate between   OSI  Reference  Model   &  TCP Reference Model  [12 marks]

 

5a.       Write short note on IEEE Standard 802.4 and Ethernet                                 [8.5 marks]

5b.       Write short note on IEEE Standard 802.3 and Ethernet                                [9 marks]

 

6a.       Write short note on IEEE Standard 802.5 and Ethernet                                [7.5 marks]

6b.       Differentiate between a continuous and discrete signal                                 [10 marks]

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