Page 84 - Computing E-Book Grade 7

The City School 2021-2022

3.5. Internet Functions

The Internet is a worldwide network of computers linked together by telephone wires,
satellite links and other means. All computers on the Internet can be divided into two

categories: servers and browsers.

Server: are where most of the information on the Internet

lives. These are specialized computers which store
information, share information with other servers, and
make this information available to the general public.

Browser: ISP servers receive requests from browsers to

view web pages, check email, etc. As each server cannot
hold all the information from the entire Internet, so in order
to provide browsers with the pages and files they ask for,

ISP servers must connect to other Internet servers. This

brings us to the next common type of server: the Host Server.

3.6. Communication Links

1. Dialup connection
2. DSL Connection Checkpoint

3. Cable Net (Coaxial Cable) Star topology: computers and devices
4. Fibre-Optic are connected to a network switch
Bus topology: computers and devices
5. Satellite Links are connected to a single linear cable
Ring toplogy: computers and devices
are connected to a closed-loop cable.

84