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Computer Network
By peace | August 7, 2007
The most important aspect of having a computer network is being able to share many computer resources, such as disk space, laser printer, data files and application programs, and perhaps the CD ROM and Scanner as well. With internet connectivity, the computer network also makes communication easier and faster for network users using Electronic mail (Email), Teleconferencing and Video Conferencing. These are the extensions of sharing resources remotely.
A computer network is a group of computers that are connected together to share resources. A standalone home PC is not connected in a network. It cannot share computer resources directly. It is not secured because data on the local hard disk storage is easily accessible by others, unless you lock them securely in a secluded room. A LAN(Local Area Network) is a group of computers in close proximity that are connected together to share resources. Generally, it consists of at least one Server and many clients PCs. Its network users can communicate to each other via the network resources such as hard-disk space, data files, application programs and laser printer. Network operating System(NOS) is system software that runs on the server to manage and maintain its users and controls the uses of all network resources.
Network Administrator is the person who is entrusted to control the access rights to all the shared resources. He creates and maintains the network user accounts, and defines users access rights(who can access what). In addition, there can be many other special types of servers connected in a network for users to use. For examples, database serves (SQL and Oracle servers), World Wide-Web servers, Lotus Notes Workflow servers and Virtual Servers.
From the corporate point of view, a computer network allows Centralised Management of their computers, users and resources. The network administrator, for instance, can organise all network users by workgroups, then assign access rights control by groups. The backup of data can also be done in one central location, while the upgrading of shared software can also be much easier.
The computer network is a more secure than a standalone personal computer. It prevents unauthorised users from using the network resources. The authentication process ensures only authorised user is allowed to use the network resources. All authorised users must login using their own user id with the correct password. In additions, Network administrator can protect the sensitive data files and programs accessible to only certain authorised network users through the setting of accessible rights.
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