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What is WAN?

 

Short form of Wide Area Network. Computer Network that covers all geographical locations and is a combination of one or more Local Area Network (LAN). Computers connected with WAN can also be mentioned as public computers. These connections are established through a Lease line or through satellite links.
 

Good example for WAN are Telephone System, Internet Connectivity, etc…  WAN networks are physically provided by ISP (Internet Service Providers). Some WAN Connectivity can be establishes as follows.

 

Connection Type

 

Description

 

 

Leased Line

 

Point-to-Point connection between two computers or Local Area Networks (LANs)

Circuit switching

 

Dedicated circuit path is created between end points. Best example is dialup connections

Packet switching

 

Devices transport packets via a shared single point-to-point or point-to-multipoint link across a carrier internetwork.

Cell relay

 

Similar to packet switching, but uses fixed length cells instead of variable length packets.

 

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