Computer+Networks

Students will require basic experience of using a desktop computer. They should understand hardware and software as well as different forms of input, output and storage devices. They should have used the Internet for research.
 * SECTION 4 ** Computer Networks
 * Recommended Prior Knowledge **

This section should be the fourth studied by the students. It builds on the knowledge obtained from studying all the previous sections.
 * Context **

This section describes the components of typical LAN and WAN networks.
 * Outline **

 Disconnect a modem from the computer and show what happens when you try to connect to the Internet
 * 4a Describe a modem and its purpose. **
 * Activities **

http://www.jegsworks.com/Lessons/lesson7/lesson7-3.htm http://www.bbc.co.uk/schools/gcsebitesize/ict/datacomm/0internetrev3.shtml (Walmsley, et. al., 2004, Chapter 4) (Leadbetter, & Wainwright, 2004, 1.1)
 * Resources **

 - Demonstrate analogue devices such as, clocks and mercury thermometers, explaining how variables are represented by an analogous quantity (time is represented by the angle of the hands, temperature is represented by the height of a mercury column etc). - Explain how data can be represented digitally in 1s and 0s.  http://www.jegsworks.com/Lessons/lesson7/lesson7-3.htm http://www.bbc.co.uk/schools/gcsebitesize/ict/measurecontrol/0computercontrolrev3.shtml http://www.bbc.co.uk/schools/gcsebitesize/ict/measurecontrol/0computercontrolrev6.shtml <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">(Walmsley, et. al., 2004, Chpts 4 & 14)
 * <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">4b State the difference between analogue data and digital data. **
 * <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">Activities **
 * <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">Resources **

<span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Symbol; mso-bidi-font-size: 10.0pt; msobidifontfamily: Symbol; msobidifontsize: 10.0pt;"> - Explain how computers work with data in a digital form whereas external devices such as telephone lines and sensors transmit data in an analogue form. - Explain the need for ADCs to convert the data in a physical form to a digital form. <span style="color: blue; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;"> <span style="color: blue; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">http://www.jegsworks.com/Lessons/lesson7/lesson7-3.htm <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">(Walmsley, et. al., 2004, Chpts 4 & 14)
 * <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">4c Describe the need for conversion between analogue and digital data. **
 * <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">Activities **
 * <span style="color: black; font-family: Times New Roman; mso-bidi-font-family: Arial; mso-bidi-font-size: 10.0pt; msobidifontfamily: Arial; msobidifontsize: 10.0pt;">Resources **