GNVQ ICT - Intermediate

Unit 10 - Networks and Communications

Hyperlinks on the level above: [Home Page for Unit 10] [ Stand-alone computers ] [ LANs ] [ WANs ] [ Standard ways of working ] [ Electronic communications ] [ Advantages and Disadvantages ] [ Using a network ]

Hyperlinks:

On this level:

Modem
Configuration
Connecting

On the level below:

The Internet is a huge Wide Area Network (WAN) where computers are linked using a variety of different connections.  Most commonly a user has a device called a modem installed in their computer.  This device converts the digital data used by the computer into analog data (sounds) that can be sent along a telephone line (rather like the noise a fax machine makes when sending a document to another fax machine).  The modem dials a special number belonging to an Internet Service Provider (ISP).  A modem inside the ISP’s computer converts the analog data back into digital form and, once the ISP’s database has checked the username and password of the user, a connection to the Internet is made.

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