UNIVERSITY EXAMINATIONS: 2021/2022
EXAMINATION FOR DIPLOMA IN INFORMATION TECHNOLOGY
DIT 402: FUNDAMENTALS OF COMPUTER NETWORKS
DATE: DECEMBER, 2021 TIME: 2 HOURS
INSTRUCTIONS: Answer Question ONE and Any Other Two Questions
QUESTION 1
a. Explain the following terms as used in computer networking:
i. Network (1 Mark)
ii. Link (1 Mark)
iii. Node (1 Mark)
iv. Routing (1 Mark)
v. Bandwidth (1 Mark)
b. Outline 5 different computer network equipment’s. (5 Marks)
c. Using a well labeled diagram illustrate network transmission below:
i. Twisted pair (2 Marks)
ii. Coaxial cable (2 Marks)
iii. Fiber- Optic cable (2 Marks)
d. State with reasons, two hardware’s needed for a personal computer to connect to the internet.
(4 Marks)
QUESTION 2 – 15 MARKS
a. A company is having a sixteen station local area network installed. Required:
i. Define Local Area Network (1 Mark)
ii. Give two topologies that could be used for the LAN structure (4 Marks)
b. Differentiate between transmission speed of data for LAN high speed (10Mb/100Mb) and
WAN generally slower (1Mb typical broadband)
(4 Marks)
c. Describe two features of each of the following types of Local Area Network (LAN):
i. peer-to-peer network; (2 Marks)
ii. client-server network. (2 Marks)
d. Outline two advantages of fiber optic (2 Marks)
QUESTION 3 – 15 MARKS
a. Using a well labeled diagram explain the OSI reference model (7 Marks)
b. Differentiate between
i. TCI/IP data model and OSI reference model (4 Marks)
ii. IPv4 and IPv6 (4 Marks)
QUESTION 4 – 15 MARKS
a. Define cyber security (1 Mark)
b. Describe each of the following computer network security terminologies:
i. Cryptography (3 Marks)
ii. Firewall (3 Marks)
iii. Secure socket layer (3 Marks)
b. Explain 5 different ways of enforcing computer network topology. (5 Marks)
