Revision notes and worksheets on Computer Networks

dineshbakshi.com has been updated with revision notes on Computer Networks. These notes are precise and cover all the important elements of the IGCSE, GCSE ICT curriculum.
These revision notes cover the following topics.

• 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.

Click here to goto Computer network -Revision notes
Attempt a revision worksheet on Network topologies. Click here