Subscribe* Sharing of resources: for example sharing the printer usage, CPU, Memory, hard drive
* Communication: eg electronic mail, instant messaging, chat
* Access to information: for example web browsing
In order to achieve the same goal, every part of the request and provide computer network services (service). Parties who request / receive services is called a client (client) and that give / send a service called the waiter (server). This architecture is called client-server systems, and is used in almost all computer network applications.[Edit] Classification
Based on the scale:
* Local Area Network (LAN): a computer network that connects a computer with another computer with a limited distance.
* Metropolitant area networks (MAN): the same principle with the LAN, only the larger distance, which is 10-50 km.
* Wide Area Network (WAN): the distance between cities, countries, and continents. This is the same with the Internet.
Based on the function: Basically any existing computer network that functions as a client and server. But there is a network that has a dedicated computer as a server and the other as a client. The others do not have a special computer that functions as a server only. Thus, based on its function then there are two types of computer networks:
* Client-server
Network is a computer with a dedicated computer as a server. A service / service can be provided by a computer or more. An example is a domain such as www.detik.com lots served by a web server computer. Or it could be a lot of service / services provided by a computer. Examples are jtk.polban.ac.id server is one computer with multi service ie mail servers, web servers, file servers, database servers and others.
* Peer-to-peer
Namely computer networks where each host can be also be a client and server simultaneously. For example in file sharing between computers on the Windows Network Neighbourhood Network have five computers (we give the name of A, B, C, D and E) that gives the right of access to its files. At one point A to access the file share of B named data_nilai.xls and also gives access to files soal_uas.doc C. When accessing files from B of A then A is functioning as a client and as a give file access to C then A is functioning as a server. Both functions simultaneously performed by a network like this so-called peer to peer.
Based on network topology, computer networks can be divided into:
* Topology bus
* Topology stars
* Ring network
* Mesh topology
* Topology tree
* Linear topology
Based on the criteria, a computer network is divided into four, namely:
1. Based on the distribution source of information / data
* Centralized Network
This network consists of the client computers and servers where the client computer that serves as an intermediary to access sources of information / data derived from a single computer server
* Distributed Network
Is the mixture so that there are few centralized network server computers that are interconnected with the client to form a specific network system.
2. Based on the geographic reach is divided into:
* Network LAN
is the network that connects two computers or more in coverage such as laboratories, offices, and in a cafe.
* Network MAN
Is the network that covers a large city and its local area. Examples of local telephone networks, cellular telephone systems, as well as some ISP's internet relay network.
* Network WAN
Is a network with coverage throughout the world. For example the network of PT 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.
* Client-Server Networks
In this network there are one 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. Client computer as an intermediary to access data on a server computer servers computer while providing information needed by the client computer.
* Network Peer-to-peer
In this network there are no client computer or 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 the data transmission medium
* Wired Networking (Wired Network)
On these networks, to connect one computer to another computer networking cables required. Network cable to function within sends the information in the form of electrical signals between the network computer.
* Wireless Network (WI-FI),
Network is a form of electromagnetic waves with the medium. On this network is not necessary cables to connect between computers because it uses electromagnetic waves that would send the signal information between the network computer.
0 komentar:
Posting Komentar