As an enterprise grows beyond a single location, it needs to interconnect LANs in various locations using a WAN. There are several technologies that are involved in the functioning of WANs, including hardware devices and software functions. This course describes the functions and characteristics of WANs and contrasts them with LANs. The course also explores how WANs relate to the OSI reference model in their design and function and which major hardware components are typically used in WAN environments. One of the most common types of WAN connection is the point-to-point connection. Point-to-point connections are used to connect LANs to service provider WANs and to connect LAN segments within an enterprise network. A LAN-to-WAN, point-to-point connection is also referred to as a serial connection or leased-line connection. WAN services are typically leased from a service provider. Some WAN services operate as Layer 2 connections between your remote locations and are typically provided by a telco provider over its WAN switches. PPP emerged as an encapsulation protocol for transporting IP traffic over point-to-point (leased line) serial connections. PPP encapsulation has been carefully designed to retain compatibility with most commonly used supporting hardware. This course highlights the operation, configuration, and verification of PPP.

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