| A | B |
|---|
| Network | Two or more commputers joined together so the data can be transferred between them. |
| Local Area Network | A network confined to a single room or building. |
| Wide Area Network | A network which covers a large geograhical area like a country. |
| Infra-Red Communications | Direct line of sight between transmitter and reciever, used for short range communcation between two devices at most. |
| Bluetooth | Can make temporary short range links between personal devices such as mobiles, headstes, palmtops, laptops and computers in a range of ten metres. |
| Wi-Fi | Typical range of twelve to fifty metres and has a typical data transfer rate of five to twenty Mbit/sec. |
| Encryption | Putting data into a code to prevent it being seen by unauthorised users. |
| Passwords | A secret code that you use to gain access to private information on a computer system or to log onto a network. |
| File Server | Provide central disk storage for users' programs and data on a network. |
| Printer Server | Allows all of the client stations to use a printer controlled by it. |
| Database Server | Manages a large database that may be accessed by client stations. |
| Network Interface Card | A small circuit board that is fitted inside a computer system to allow it to communicate with a computer network. |
