UNIVERSITY EXAMINATIONS: 2017/2018
EXAMINATION FOR THE DIPLOMA IN BUSINESS INFORMATION
TECHNOLOGY
DBIT401 NETWORK MANAGEMENT
DATE: APRIL 2018 TIME: 1 ½ HOURS
INSTRUCTIONS: Answer any THREE questions.
QUESTION ONE
a) Briefly explain the role of OSI in network design [4 Marks]
b) Discuss Layer 2 of the OSI model and the devices involved [12 Marks]
c) Describe the role of the TCP/IP protocol in Network Management [4 Marks]
QUESTION TWO
a) As an IT Technician, explain how you would use the following:
i. Ping [2 Marks]
ii. Traceroute [2 Marks]
iii. DNS lookup [2 Marks]
iv. Port check [2 Marks]
b) Describe THREE common goals of security in computer networks. [6 Marks]
c) Outline THREE threats to network security and describe their possible solution. [6 Marks]
QUESTION THREE
a) The Simple Network Management Protocol [SNMP] is important for Network Management
System. Briefly discuss what it manages in a network setup [6 Marks]
b) There are three types of switching namely; Circuit Switching, Message switching, and Packet
Switching. Discuss the mechanisms implemented in these types of switching techniques.
[12 Marks]
c) Briefly describe the application of the above (b) named switching techniques. [2 Marks]
QUESTION FOUR
a) Define UDP as used in networking [1 Mark]
b) UDP is said to be unreliable. Explain why we need UDP even though it is unreliable. [6 Marks]
c) Differentiate the following multiplexing techniques
i. Frequency Division Multiplexing [2 Marks]
ii. Time Division Multiplexing [2 Marks]
iii. Wavelength Division Multiplexing [2 Marks]
iv. Code Division Multiplexing [2 Marks]
d) Briefly describe the features and uses of the following in the context of networking: [5 Marks]
i. RJ45 [1 Mark]
ii. HDMI [1 Mark]
iii. Fibre optics [1 Mark]
iv. CAT5 [1 Mark]
v. Proxy Server [1 Mark]
QUESTION FIVE
a) The transmission mode decides how data is transmitted between two computers. List the two
transmission modes, and explain how they work. [6 Marks]
b) An analog signal is characterized by its amplitude, frequency, and phase. There are three kinds
of digital-to-analog conversions. Discuss them. [9 Marks]
c) Define CRC as applied in networking and data transmission. [1 Mark]
d) Describe in detail how CRC works [4 Marks]
