REVIEW OF 2022
History and evolution of SD-WAN
Modern SD networking and SD-WAN technology evolved from earlier networking solutions like point-to-point (PPP) leased lines, frame relay, and MPLS. PPP was the original mode for connecting multiple local area networks (LANs) before frame relay removed the need to buy and manage individual connecting links between various corporate locations. MPLS connection made more improvements by bringing previously separate functions such as voice, video, and data networking onto the same network using Internet Protocol (IP)-based technology. Fast-forward to the 2000s, and multiprotocol label switching (MPLS) came to popularity. MPLS soon overtook frame relay in popularity because of how it leverages Internet Protocol (IP)-based technology to bring previously separate functions such as voice, video, and data networking onto the same network. MPLS today is the most common technology in use for enterprise WANs, and is still held up for the
reduced latency and quality of service (QoS) benefits it provides. In the 2010s, specifically 2013, SD-WAN was born, and as more technologists examined SD-WAN for its benefits, they came to realize many of the same advantages SD-WAN has over MPLS, similar to how MPLS brought more advantages than frame relay. As a simple explanation, SD networks deliver MPLS-level QoS while being significantly less expensive and significantly easier to scale. SD-WAN can handle a variety of connections and dynamically move traffic over the best transport available, and can provide both redundancy and much more capacity using lower-cost links. SD-WAN solutions are significantly cheaper than MPLS overall when time-to-installation and time-to-delivery are also considered. The best SD-WAN solutions offer zero-touch provisioning, allowing sites to be brought on quickly and not requiring networking or security experts to be on-site for installation. every solution for maximum protection. As part of such an integrated monitoring system, the networking and connectivity functionalities of an SD-WAN aren’t just more closely associated with the security solutions installed on the platform. They’re the same thing. Deployment of security piecemeal is also unwise. Because of the dynamic nature and high scalability of SD-WAN, overlay security is not only very expensive to deploy and maintain, but often ends up with delays when reacting to connectivity changes, leaving critical connections and data vulnerable. An integrated system ensures that SD-WAN connectivity, traffic
Fortinet Insert 6/8
Why is integrated SD-WAN security critical? One of the critical requirements for SD-WAN success is fully integrated security. Without it, SD-WAN becomes just another attack vector. A secure SD-WAN solution is explicitly designed to interoperate as a single offering, ideally with each element running on the same operating system and managed using a single-pane-of- glass interface. This ensures that transactions are all seen and inspected, and any threats or anomalous behaviors are shared between
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