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Bit 2108 : Computer Networks Question Paper

Bit 2108 : Computer Networks

Course:Bachelor Of Business Information Technology

Institution: Jomo Kenyatta University Of Agriculture And Technology question papers

Exam Year:2013

JOMO KENYATTA UNIVERSITY
OF
AGRICULTURE AND TECHNOLOGY

University Examinations 2011/2012

END OF SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN INFORMATION TECHNOLOGY

BIT 2108 : COMPUTER NETWORKS

DATE: AUGUST 2011 TIME: 2 HOURS

INSTRUCTIONS: ANSWER QUESTION ONE (COMPULSORY) AND
ANY OTHER TWO QUESTIONS.
______________________________________________________________________

QUESTION ONE

(a) Differentiate between the following:

(i) Logical and physical addresses.
(ii) Pear to pear and server based networks.
(iii) Star and ring topologies.
(iv) Parallel and serial transmissions.
(v) Routable and non-routable protocols. 9 [10 marks]

(b) List any five advantages of using computer networks. [5 marks]

(c) Explain the role of the following OSI layers:

(i) Application layer.
(ii) Network layer.
(iii) Session layer.
(iv) Transport layer.
(v) Presentation layer. [10 marks]

(d) Define the following terms as used in computer networks:

(i) BNC terminator.
(ii) Attenuation.
(iii) Shared data.
(iv) Packet.
(v) Throughput. [5 marks]

QUESTION TWO

(a) Discuss any five factors that influence the choice of a network topology. [10 marks]

(b) Discuss the following network devices:

(i) Gateway.
(ii) Switch.
(iii) Bridge.
(iv) Router.
(v) Brouter. [10 marks]

QUESTION THREE

(a) Discuss the functions of the NIC. [4 marks]

(b) Differentiate between I.P. and MAC addresses. [4 marks]

(c) Explain the following modes of transmission:

(i) Simplex.
(ii) Half-duplex.
(iii) Full duplex. [6 marks]

(d) Computer networks increase efficiency and reduce costs. Discuss how they achieve these goals. [6 marks]

QUESTION FOUR

(a) Explain the functions of the following types of servers:

(i) File server.
(ii) Application server.
(iii) Mail server.
(iv) Proxy server. [8 marks]

(b) Define the term protocol and explain the advantages and disadvantages of using the TCP/IP protocol. [5 marks]

(c) Discuss the factors that influence the choice of a transmission media. [7 marks]

Bit 2108 : Computer Networks Question Paper

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