1.3.1 Network & Topologies

1.3.1 Network & Topologies

1. Local Area Network

   • A collection of computer over a small geographical area
   • Set up and maintained by the organisation that uses it
   • Typically found in homes, offices and schools

2. Wide Area Network

   • A collection of computers over a large geographical area
   • The internet is a good example of a WAN
   • Very expensive to set up
   • Often rented from a larger telecommunications company
   • Often used with international contracts

3. Client - Server Model

   • Each computer has the role of either central server or a client
   • The client can send requests to the server, the server will then process the request
   • Server provides services such as storing files, printing or hosting websites
   • Security can more more easily controlled from a central server
   • Often very expensive hardware
   • However if the server fails then the whole network is left useless

4. Peer to Peer network

   • Each computer is known as a peer
   • Each peer on the network is responsible for its on security
     • And making sure that they remain connected to the network
   • Cheaper than Client - Server network