Computer Networks

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.


Revision Notes Article Count:  9
Interactive Quizzes Article Count:  6


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