# WAN

One of the [Types of ](https://app.gitbook.com/@mudassirs46/s/network-fundamentals/~/drafts/-MRZ4cjfS8UXyANv_uLC/types-of-network)[Network](https://app.gitbook.com/@mudassirs46/s/network-fundamentals/~/drafts/-MRZ4cjfS8UXyANv_uLC/about-this-site) is WAN

* When two or more computers or communicating devices or Network which are Geographically separated but not within the same Metro city, if connected are said to be connected on WAN.
* The most commonly used Data-Link Layer protocols are Ethernet, HDLC & PPP where Ethernet is used in LAN Whereas HDLC & PPP are used in WAN.
* WAN like Ethernet LANs uses Physical Layer Standards as well as Data-Link Layer to connect two or more distanced LANs with the help of a Router.
* **There are two types of WAN:**
  * [**Leased Line WAN**](https://app.gitbook.com/@mudassirs46/s/network-fundamentals/~/drafts/-MRZ4cjfS8UXyANv_uLC/lease-line-wan)
    * Although less commonly used still it has been an option for networks for half a century.
  * [**Ethernet WAN (EoMPLS)**](https://app.gitbook.com/@mudassirs46/s/network-fundamentals/~/drafts/-MRZ4cjfS8UXyANv_uLC/ethernet-wan-eompls) 
    * Uses the same Data-Link Protocols as Ethernet LANs + Additional features to make the link work for longer distances.

## References:

* RST Notes
* CCNA 200-301 OCG, Volume 1, Pg. 60 - Wendell Odom.