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Bit2108:Computer Networks Question Paper

Bit2108:Computer Networks

Course:Bachelor Of Information Technology

Institution: Meru University Of Science And Technology question papers

Exam Year:2012

1
a. Define the following terms: (4 Marks) i. Latency ii. DNS iii. CRC b. Describe any two functions of the following layers in the OSI reference model: network, data link and physical layers. (6 Marks) c. With the help of well illustrated examples, describe any three benefits of networks. (6 Marks) d. List and give the function of any two network bodies. (4 Marks) e. Describe any two dynamic routing protocols. (4 Marks) f. Describe any three transmission media. (6 Marks)
QUESTION TWO – 20 MARKS
a. Compare the operating characteristics of Token Ring and Ethernet. (8 Marks) b. Explain the disadvantages of using wireless communication in networking applications. (4 Marks) c. What is a MAC address? (2 Marks)
d. Describe the following security threats: i. Denial of service attacks (2 Marks) ii. Data diddling (2 Marks) iii. Social engineering (2 Marks)
2
QUESTION THREE – 20 MARKS
a. Why is IP addressing used in computer networks? Differentiate between any three IP classes. (5 Marks) b. Differentiate between IPv4 and IPv6. (4 Marks) c. List any two impediments that may arise as a result of data transmission. (2 Marks) d. With well labeled diagrams, describe the following modulation techniques: i. Amplitude modulation ii. Frequency modulation iii. Phase shift modulation
QUESTION FOUR – 20 MARKS
a. Describe two types of multiplexing techniques used in transmission of signals. (6 Marks) b. Define encryption. Describe two encryption techniques. (7 Marks) c. Describe two functions of the MAC sublayer. (4 Marks) d. List three benefits of WLANS. (3 Marks)
QUESTION FIVE – 20 MARKS
a. Five network security issues that have to be dealt with are: authentication, authorization, non repudiation, confidentiality and integrity. Describe any three of these. (6 Marks) b. Describe the three error handling mechanisms. (6 Marks) c. What is the importance of the TCP and IP protocols within data transmission? (6 Marks) d. Differentiate between circuit switching and packet switching. (2 Marks)

Bit2108:Computer Networks Question Paper

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