Internet has never been possible without the invention of intelligent switches, satellites, fiber optics and LAN cards. Those who find it difficult to get idea of wide area network, the Internet is a living example of it. Before going into the wide area network (WAN), we must have an understanding of what is Local Area Network (LAN).
Local Area Network, as the name suggests, is a network built in a limited area, using LAN cables, switches and LAN cards. An example is a network of university or a trade office in only one location. The computers on a local network are connected to a network switch. You can make this network a working group (share of limited resources) or domain (share all kinds of resources and services). On the domain, you have the privilege to grant permissions for users to share resources or limit their use certain services. How LAN can only work within a certain distance, we must WAN to connect the institutions and offices in different locations.
WAN connects two or more LANs, and this is possible with the use of devices such as routers. There are many ways to build a wide area network. Or you can set their own cables between two or more locations or you can use dedicated lines. Most companies use lines as very limited companies may bear the cost of thousands of pounds for it rented.
The companies and institutions get the lines from different providers of leasing services and pay them on a monthly basis. Today, many companies are establishing Virtual Private Network (VAN) using leased lines. A VAN can be established with the purchase of IP addresses directly from the service provider, to two or more different positions. To protect this network, the network administrator uses routers and firewalls to protect the network.
On WAN, users in different locations are connected to a central server. The name of this computer is the server because it is there to serve all network computers. All computers on the network are connected to the central database on the server. These computers to save data in real time, send queries to the server and retrieve the reports at the same time. The banking system is a great example of a WAN.
The advantages of a wide area network are unlimited. It sits in a country, and the office in another country is like a next room. You can share documents, reports, print, query databases, searching in thousands of records in just a few quick seconds, monitor site distant offices using digital cameras, and do much more. The advantages of a wide area network are endless; it is up to you what benefits you want to achieve with this technology; the sophistication obviously increases the cost factor.
With many advantages of wide area network, there are also some disadvantages associated with, but can be addressed by using the latest technologies. On the WAN, security is an important factor. When you connect to the Internet using a direct IP, anyone can enter and affect your system. To this end, firewalls and routers titles are implemented, that surely with thousands of pounds of expenses. The WAN latency period is high, but can also be addressed by taking high-speed Internet connections. Establish an A Wide Area Network , businesses and institutions need a lot of money, color: as technologies that make the network safe color: color: so serve your needs they are on very expensive .
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