| Wide Area Network |
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| CATEGORIES ABOUT WIDE AREA NETWORK | |
| wide area networks | |
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WANs are used to connect Local Area Network s (LANs) together, so that users and computers in one location can communicate with users and computers in other locations. Many WANs are built for one particular organization and are private. Others, built by Internet Service Provider s, provide connections from an organization's LAN to the Internet. WANs are most often built using Leased Line s. At each end of the leased line, a Router connects to the LAN on one side and a hub within the WAN on the other. Network Protocols including TCP/IP deliver transport and addressing functions. Protocols including Packet Over SONET/SDH , MPLS , ATM and Frame Relay are often used by service providers to deliver the links that are used in WANs. X.25 was an important early WAN protocol, and is often considered to be the " Grandfather " of Frame Relay as many of the underlying protocols and functions of X.25 are still in use today (with upgrades) by Frame Relay. Academic research into wide area networks can be broken down into three areas: Mathematical Model s, Network Emulation and Network Simulation . |
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