Discuss the following characteristics that determine the effectiveness of any data communication system.

Jitter [2 marks]

Timeliness [2 marks]

Accuracy [2 marks]

Delivery [2 marks]

Errors can arise in a communication circuit from a variety of causes. Such errors may lead to degradation of the transmitted signal. Thus the receiving end cannot correctly determine what was sent

List four conditions that can cause errors on a communication line [4 marks]

Describe the various error detection methods that can be put in place [8 marks]

Describe what can be done to correct errors to maintain data integrity [8 marks]

Explain five hardware devices required to set up a network [10 marks]

Chronologically list the seven layers of OSI model [5 marks]

State four means that wireless networks use to carry signals from one computer to another without cable connection [4 marks]

What is OSI in full. [1 mark]

Define the following terms

Data communication [2 marks]

Computer network [2 marks]

With aid of a diagram, distinguish between parallel and serial transmission [4 marks]

State three advantages of wireless networks over guided networks [3 marks]

What is the purpose of having a metal foil in shielded twisted pair (STP) cables? [2 marks]

Courses delivered using network or internet resources are often called online learning experiences, or e-learning. The availability of e-learning courseware has multiplied the resources available to many students many times over. Discuss four benefits of the e- learning courseware [4 marks]

Explain the following transmission modes in data communication, and give appropriate examples in each case

Simplex [3 marks]

Half- duplex [3 marks]

Full duplex [3 marks]

Discuss the following concepts as used in computer networks.

Fault tolerance [2 marks]

Scalability [2 marks]