Learning Outcomes

At the end of this unit the students should be able to:

  • describe a modem and its purpose;
  • state the difference between analogue data and digital data;
  • explain the need for conversion between analogue and digital data;
  • identify the advantages and disadvantages of using common network environments such as the Internet;
  • describe what is meant by the terms user id and password, stating their purpose and use;
  • identify a variety of methods of communication such as fax, e-mail, bulletin boards, and tele/video conferencing;
  • define the terms Local Area Network (LAN), Wireless Local Area Network and Wide Area Network (WAN);
  • describe the difference between LANs, WLANs and WANs, identifying their main characteristics;
  • identify the different network topologies (including star, ring, bus and hybrid);
  • describe the characteristics and purpose of common network environments, such as intranets and the Internet;
  • describe common network devices (including hubs, routers, bridges, switches and proxy servers)
  • discuss the problems of confidentiality and security of data, including problems surrounding common network environments;
  • identify the need for encryption, authentication techniques, including the use of User identification and passwords, when using common network environments such as the Internet.

 

Browse IGCSE ICT

Components of Computer

Input Output Devices

Storage Devices and Media

Computer Networks

Data Types

Effects of Using ICT

Application of ICT

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