Definition of Computer Networks

Network (network) is an operating system that consists of a number of computers and other network devices that work together to achieve a similar tujuam or a network consisting of points (nodes) are connected to one another, with or without cable. Each serves as a workstation nodes (workstations). One of the nodes as media services or servers, which are set certain functions of other nodes. Basically, a computer network technology itself is a combination of computer and also anatara tenologi communication technology.

The purpose of computer networks:

1. Network enables more efficient resource management: For example, many users can share a single printer with high quality, compared to using low quality printers at each desk. Additionally, network software licenses can be cheaper than a separate stand-alone license for the same number of users, and share the CPU usage, memory, and harddsik.
2. Networks help maintain information in order to remain reliable and up-to-date: centralized data storage system is well managed allows multiple users mengaskses data from a variety of different locations, and restrict access to the data while it is being processed.
3. Network helps speed up the process of sharing of data (data sharing). Transfer data on the network is always faster than other means of data sharing is not a network.
4. Enabling network-working groups communicate more efficiently. Letters and delivery of electronic messages is the substance most network systems, in addition to scheduling system, project monitoring, online conferencing and groupware, which all contribute to the team work more productively.
5. Networks help businesses serve their clients more effectively. Remote access to centralized data allows employees can serve clients in the field and the client can directly communicate with suppliers.

In order to achieve the same purpose, any part of the computer network request and provide layanaan (service). The party requesting the service is called a client (client) and who provide services called service (server). This architecture is called client-server systems, and is used in almost all computer network applications.