The sharing of fax machines, printers and modems amongst many computers and users to reduce operational costs. A database on a computer network is a very important application as it stores and runs many important data and jobs. E-mails and chats can be used for instantaneous communication and sending files over a computer network.
Computer networks are classified by size, as local area networks (LAN), Wide Area Networks (WAN), metropolitan area networks (MAN) and Personal Area Networks (PAN). The topology (topology is the network so computing and network resources are connected) of networking can be classified as Bus Network, Ring Network and Star Network.
The networking hardware basically consists of wiring, network cards and a hub. Computer network cards are needed so that computer can understand what the other computer is "talking". The network adapters have a unique MAC address to identify computers on a network computer. Hubs connect all computers in the network. Hubs can also be used to connect to other hubs for increase the size of the network. Two computers can be connected using Ethernet cards or phone lines or power lines for communication, with hardware kits available at roughly a cost of $ 100.
As the number of computers in an office or home increases, let the number of cables, networking wireless is a viable solution. In Transreceivers radio wireless network or infrared signals are used to communicate between computers and peripherals. Examples of networking include wireless Wi-Fi and Bluetooth technology, although there may be the security issues involved in implementing wireless networking. However, it is definitely a stronger preference towards wireless networks today among consumers.
Computer networks have added a new dimension in the 21st century. Today, the cyber-world is much faster and more larger than the real world. All this was made possible thanks to computer networks. Computer networks have revolutionized business, communication, Travel, research, defense, society and almost all human endeavors. The evolution of computer networks has contributed to the revolution a technological leap forward.
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