What you need to know

Click on the following for definitions of the key terms you need to know:
| | Local Area Network | Wide Area Network | | Servers | Client | Ethernet | Access | Access Permissions | Login | Password | Firewall | Sysadmin | UPS | EDI

Local Area Network

It is a computer network system that connects workstation only covers a small area, such as a school, a home, or and airport. The computers are physically close to each other and usually in the same building. A LAN will have computers and periperhals such as printers and scanners. It allows for connection between workstations within close proximity with each other. It is relatively easy to set up and is usually use by schools, offices, or a home. It is very useful for exchanging files, sharing resources such as scanners and printers.

Wide Area Network

A computer network that is larger than a local area network (LAN), serving more than one geographical location, e.g. several company sites, an entire state or country, or several countries. A good example would be the Internet.


A computer that provides services such as processing information and storing data for other computers on a server. A vital part of the network which makes it workable. More then one server can be set up to increase the speed of the network and add extra reliability in the event that one of them went offline.


A computer within a network that isn’t the host server and can send request to the host server. A client is a computer that is requesting information from the server.


A popularly used form of LAN architecture. The method is to connecting a number of nodes to form a LAN. With protocol to control the transfer of information and to prevent simultaneous transmission by two or more system.


A client computer sending a request to a server though the network.

Access Permissions

Controlling which client are allowed to access the network and connect to the server.


Connecting to a computer network or system by entering a user name and password.


The most commonly used form of system security tool, which requires the user to enter a code in order to login and allowed access to the network.


A computer security system, it is designed to block and intercept unauthorized access or information.


Users that are authorized to make changes to the servers in the network and limit the access to other users. People that are employed to maintain and operate a computer network or system.


An Uninterrupted Power Supply, a rechargeable battery that enables the computer to remain on even in the event that the normal power supply got cut. It provides a backup for the server so that the network can remain online in the event that the main power supply gets cut.


Electronic Data Interchange, the standardized method of transferring files. It is Usually used by online business for keeping their inventory in stock.

Technical Terms

(Both of the following resources are links to the //www.teach-ICT.com// website)
Click here for a good mini-website on Networks.
Click here for a great flash animation/simulation on creating a network. )

Please follow these links and read these DRAFT notes:

Proxy Servers
Network Notes