Businesses that run mission critical applications across Wide Area Networks (WANs) require continuous uptime and outages impede business operations. Time is a crucial factor and results in productivity and revenue losses if there is an outage of the WAN. To ensure high availability of WANs, redundant connections to the WAN and/or Internet is required. Redundancy is a system design, which by duplicating components or data, facilitates viable alternatives in the event of component or other failures. Redundant network system components include hard disk drives, switches, telecommunication provider links, operating systems, which are set up as back up systems to support the primary resources in cases of failure. There are various kinds of redundancy – network redundancy, data redundancy, server redundancy, and many concept and component oriented redundancy. In the network scenario, Wide Area Network (WAN) Redundancy is a major concept. WAN Redundancy is mainly a back up system over a network setting that enables uninterrupted service and constant “uptime., When there is a network outage, having a WAN redundancy system in place will enable the system to immediately switch over to the active WAN link. It will also load balance if there are more WAN connections. Redundancy in systems and WANs helps businesses to avert disruptions in network services.