Computer Networks

Computer network is a system comprising computers and device other network working together to achieve a same goal.

Criteria computer network is divided into 4, namely:

1. Based on the distribution of sources of information / data

- Network This network consists of a centralized computer where the client and the server that the client computer that serves as an intermediary to access sources of information / data derived from a single computer server

- Networking is a combination of several networks of distributed centrally, so there are several computer servers that are interconnected with the client to form a specific network system.


2. Based on the geographic reach is divided into:

- Network LAN is a computer network that connects 2 or more in coverage such as laboratories, offices, and in 1 cafe.

- Network MAN network is covering a large city and its local area. Examples of local telephone networks, cellular telephone systems, as well as some ISP's internet relay network.

- WAN Network A network with worldwide coverage. Examples of PT network. Telkom, PT. Indosat, as well as networks such as GSM Cellular Satelindo, Telkomsel, and many more.


3. Based on the roles and relationships of each computer in the process data.

- Network Client-Server In this network there are 1 or more server computers and client computers. Computers that will be a server computer or client computer must be altered through software on the network protocol. As an intermediary for the client computer can access data on a server computer and the server computer provides the information required by the client computer.

Networking-Peer-to-peer network does not exist at the client computer and server computer because all computers can do the delivery and reception of information so that all computers function as clients as well as a server.


4. Based on data transmission media

- Wired Network (Wired Network) In this network, to connect one computer to another computer network cables required. Function in the network cable to send information in the form of electrical signals between the network computer.

- Wireless Network (Wireless Network) is a network with the medium in the form of electromagnetic waves. On this network is not necessary cables to connect between computers because it uses electromagnetic waves to transmit signals between the computer information network.

Source : www.wikipedia.com