NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JANUARY/FEBRUARY 2013 EXAMINATION

COURSE CODE:                                                                              DAM 364                                                                            

COURSE TITLE:                                                                             Management Information Systems

DURATION:                                                                                     2 Hours

INSTRUCTIONS:                                                                            Answer any four (4) questions

1. Define the following network terms:

1. LAN                                                                                                                               3 marks
2. Backbone network                                                                                                                4 ½ marks
3. Node                                                                                                                             3 marks
4. Network topology                                                                                                  3 marks
5. NIC                                                                                                                                                4 marks

2a.          What is Ping?                                                                                                                 4 marks

 b.           What is DNS?                                                                                                                  4 marks

 c.            What is the difference between a hub and a switch?                                           5 ½ marks

 d.           Describe networking.                                                                                                              4 marks

3a.      What is computer security?                                                                                           5 ½ marks

                  b.          Briefly explain the three most popular cryptography systems.                12 marks

4a.          Distinguish between virus and worm.                                                                  5 marks

                  b.          Who are hackers?                                                                                                           3 ½  marks   .                      

c.             Explain what is meant by teleprocessing?                                                           4 marks

                  d.          List five limitations of the Internet.                                                                        5 marks

                5a.       Distinguish between batch processing and time sharing.                                5 ½ marks

 b.           What is a terminal? Differentiate between the two types with an example each.             12 marks

6.            List and briefly describe four major types of system in organization.  17 ½ marks