Basic Introduction to Computer Networks

Based on the criteria, computer networks can be divided into four namely:
1. Based on the distribution of sources of information / data
- Centralized NetworkThis network consists of client and server computer where the client computer that serves as an intermediary to access sources of information / data derived from a single computer server
- Distributed NetworkIs a mix of some centralized network so that there are several computer servers that are interconnected with the client to form a specific network system.

2. Based on geographic coverage can be divided into:
- Network LANis the tissue that connects 2 computers or more in coverage such as laboratories, offices, and in a cafe.
- Network MANIs a network that covers a large city and its local area. Examples of local telephone networks, cellular telephone systems, as well as relay some ISP Internet network.
- Network WANIs a network with coverage throughout the world. Examples of PT network. Telkom, PT. Indosat, as well as networks such as GSM Cellular Satelindo, Telkomsel, and much more.

3. Based on the role and relationship of each computer in data processing.
- Client-Server NetworksIn this network there are 1 or more server computers and client computers.Computers that will be a computer server or a client computer and can be switched through the network software protocol. The client computer as an intermediary to be able to access data on a server computer while the computer server providing the information required by the client computer.
Networking-Peer-to-peerIn this network there are no client computer and server computer because all computers can perform transmission and reception of information so that all computers function as clients as well as the server.

4. Based on data transmission media
- Wired Network (Wired Network)In this network, to connect one computer to another computer takes the form of cable connecting the network. Network cable to function within sends information in the form of electrical signals between the network computer.
- Wireless Network (Wireless Network)Is a network with medium in the form of electromagnetic waves. In this network is not required cable to connect between computers because it uses electromagnetic waves which will transmit signals between a computer information network
source: alfandra.blogspot.com