Question 1

a. With the help of diagrams, describe LANs, MANs and WANs

b. Explain Key Elements Required for Communication Model.

c. Differentiate between Peer-to-Peer Networks and Server Centric Networks.

d. Provide the main differences that exist between a physical Topology and a Logical topology

e. Describe CSMA-CD and CSMA- CA

f. List five benefits of Networked computers over standalone computers

Questions 2

a. What are the major classes of Cable Media? Explain

b. Explain Public Telephone Network in detail with the help of Diagram

c. What are main types of optical sources? Describe how light propagates in optical fiber

d. Describe pulse code modulation and how an analogue signal is converted to digital signal

e. Describe guided and unguided transmission modes giving examples.

Questions 3

a) Define the following Network Terms:

i.Multiplexing

ii.Checksum

iii.Attenuation

iv.Encoding and decoding

(b) With the aid of diagrams define and describe the following communication systems

i.Simplex mode

ii.Half Duplex

iii.Full Duplex

iv.Asynchronous

v.Synchronous

(c) Explain what is meant by the following terms:

i.Serial data transmission

ii.Parallel data transmission(4 Marks)

Question 4:

(a)Define fiberoptic communication principle and light propagation through fiber optic cable

(b)For the two types of optic fiber:

i.List and provide a brief description

ii.Provide the characteristics of each optic fiber named above

iii.Discuss where the said optic fibers are used

(c)Describe:

i.The sources of light for optic fiber transmission

ii.Optic fiber amplifiers

Question 5:

Entrepreneurship is buzzing in Zambia as more and more people seek opportunities to be their own boss and start a business they are passionate about. This was very evident whenBongo Hiveorganized the Zambian arm for Demo Africa, an initiative that aims to bring together Africa's most innovative companies and provide them a global platform to launch their products and announce to Africa and the world what they have developed.

1. Explain how innovation and Information Technology complement each other in modern businesses
2. As part of their growth strategy in supporting entrepreneurs, Bongo Hive can leverage on cloud computing to support its initiatives. Describe the infrastructure that will be needed to implement a Cloud.
3. Describe the type of resources that can be shared by Networked computers

Question 6: Describe the seven layers and functions of each the OSI reference models

Question 7:

1. Describe the following terms
2. Frequency division Multiplexing
3. Time division multiplexing
4. Asynchronous and Synchronous Time Division Multiplexing
5. ISDN
6. Digital signal
7. Analog Signa.
8. Describe the following types of signaling
9. Common channel signaling)
10. In-Channel Signaling
11. Circuit switching
12. Frame