SD-WAN in (Relatively) Plain English

One of the biggest changes occurring in the business world relates to wide area networks (WANs). Early WANs evolved as networking technology evolved, using standards such as X.25, Frame Relay, ATM and MPLS. The advantage of these was their predictability, with the carrier often guaranteeing a certain level of bandwidth and performance, albeit relatively low bandwidth at a high cost.

More recently, WANs have begun to use best-effort networks such as broadband and 4G LTE. These offer much higher bandwidth, lower cost, and faster setup time, but they don’t have the same guaranteed performance as the technologies they’re replacing.

That’s where a software-defined wide area network, or SD-WAN, comes into play. This white paper explores the possibilities and benefits of SD-WAN when wired broadband and wireless 4G LTE both run through the same all-in-one network solution.