CIT 305 MARCH/APRIL 2016 Examination

                                

   National Open University of Nigeria
  14-16 Ahmadu Bello Way, Victoria Island Lagos 

         School of science and Technology

      MARCH/APRIL 2016 Examination

 

^{COURSE CODE: CIT3 305}

^{COURSE TITTLE: NETWORKING AND COMMUNICATION TECHNOLOGY}

 ^{TIME ALLOWED: 3hrs}

 Instructions: ANSWER ANY 5 QUESTIONS 

1a. Briefly describe what a virtual private Network is?

b. write down four reasons for creating computers networks.

2a.Briefly explain the difference between Ethernet and Gigabit Ethernet 

b.write short notes on the following types of physical media:

          i. Unshielded Twisted Pair(UTP) cable

          ii. Fibre-optic cable

          iii. Coaxial cable

3a. Describe the Network Layer of the OST Reference model

b. Write a brief note on the IEEE802 11b Wi-Fi standard 

4a. Briefly describe the addressing and other functions of the internet protocol (IP) in the IPv4 internet suit

b. Briefly Explain Why TCp is considered a reliable protocol

5a. Explain briefly four threats that may face an enterprise network that is connected to the Internet

b. Distinguish between a Man and a WAN

6a. Give a brief description of the following

          i. Multiplexer

          ii.Modem

b. Briefly Explain the following aspect of Network planning and designs:

          i. Business requirements

          ii. Proof of concept

7a. Describe four types of noise, indicating which type is particularly harmful to digital data.

b. Give a brief description of the ISDN technique highlighting its main advantage over other communication techniques

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