what is WAN

A wide area network is a telecommunications network that extends over a large geographical area for the primary purpose of computer networking. Wide area networks are often established with leased telecommunication circuits. 

Advantages of a wide area network (WAN)

• Covers large geographical area: ...
• Centralized data: ...
• Get updated files and data: ...
• A lot of application to exchange messages: ...
• Sharing of software and resources: ...
• Global business: ...
• High bandwidth: ...
• Distribute workload and decrease travel charges
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• Disadvantages Of WAN Technology

• -Setting up a network can be an expensive and complicated experience. The bigger the network the more expensive it is.

  -Security is a real issue when many different people have the ability to use information from other computers. Protection against hackers and viruses adds more complexity and expense.

  -Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed.

  -Information may not meet local needs or interests