Understanding of computer networks

Now we talk about what the Network, Computer Network particular. The word "computer network" may already be familiar to our ears, considering almost every day we involve the computer network in our work.The computer network is a system that consists of two or more computers connected to each other through a transmission medium or communication medium that can share data, applications and the sharing of computer hardware.

The term computer network itself can also be interpreted as a collection of a number of communication terminal consisting of two or more computers connected to each other.Purpose of the Network is to make the information / data that brought the sender (transmitter) can be up to the recipient (receiver) with precise and accurate.Computer networks allow users to communicate with each other easily.In addition, the role of computer networks is needed to integrate data between client computers so diperolehlah a relevant data.Benefits of Computer NetworkingTalking about the benefits of computer networks. There are many benefits of computer networks, among others:• With a network of computers, we can access the files that we have at the same time file diseberluaskan others who have been through a network, such as Internet network.• Through a network of computers, we can make the process of sending data quickly and efficiently.• Computer networks help people connect with other people from different countries with ease.• In addition, users can also send text, pictures, audio, and video in real time with the aid of a computer network.• We can access news or information very easily via the Internet because the Internet is one example of a computer network.• Suppose that in an office requires a printer, we do not need to buy a printer with a computer found in the office. We can buy a printer only to be used by all employees of the office with the help of a computer network.

 Various Kinds of Computer NetworksGenerally, a computer network can be classified into five categories, based on geographical reach, distribution of sources of information / data, data transmission media, the role and relationship of each computer in processing the data, and based on the type of topology is used. Here's the full translation:A. Based on Geographic Reach1. LANLocal Area Network or LAN is often abbreviated with a network that covers only a small area, such as cafes, offices, or schools. Generally the LAN network, the area is not far from 1 km square.Usually LAN network using the IEEE 802.3 Ethernet technologies that have a data transfer rate of about 10, 100, or even 1000 MB / s.In addition to using Ethernet technology, not a few also are using wireless technologies such as Wi-Fi to the LAN network.2. MANMetropolitan Area Network or MAN is a network that includes a city and comes with high speed data transfer. Arguably, MAN network is a combination of several LAN networks.Jangakauan of MAN network ranges from 10-50 km. MAN has only one or two wires and is not equipped with a switching element which serves to make the design becomes more simple.3. WANWide Area Network or WAN is a network whose reach covers a wide geographical area, such as a country or even continent.WAN is generally used to connect two or more local networks so that users can communicate with other users despite being in a location that berbebeda.

B. Based Distribution Source Information / Data1. Centralized NetworkThe definition of a centralized network is a network that consists of a client computer and the server computer where the client computer serving as an intermediary in accessing sources of information / data coming from the server computer.In a centralized network, there is the term dumb terminal (dumb terminal), where the terminal does not have the data processing devices.2. Distributed NetworksThis network is the result of the combination of several centralized network that allows multiple servers and client computers that are connected to form a particular network system.

C. Based on Data Transmission Media Used1. Wired Network (Wired Network)Data transmission medium used in this network either wired.The cables are used to connect one computer to another computer in order to exchange information / data or connect to the Internet.One of the transmission medium used in a wired network is a UTP cable.2. Wireless Network (Wireless Network)In this network required electromagnetic waves as transmission media data.Unlike the wired network (wired network), this network does not use a cable to exchange information / data with other computers it uses electromagnetic waves to transmit information signals / data between one computer to another computer.Wireless adapter, one of the transmission medium used in the wireless network.

D. Based on Roles and Relationships Each Computer in Data Processing1. Client-Server NetworkThis network consists of one or more computer servers and client computers. Usually consists of one server computer and multiple client computers.The server computer is responsible for providing data resources, while the client computer can only use the data resources.2. Peer to PeerIn this network, each computer, be it a computer server or the client computer has the same position.Thus, the server computer can be a client computer, and vice versa client computer can also be a computer server.

E. Based on Network Topology UsedNetwork topology is a form / structure of the network that connects computers to one another.For more details about the network topology, please read the article all sorts of computer network topology that I've ever written before.A few of Understanding this network, may be useful for those who need it and serve as a reference for those who do not need. thank you