SD-WAN, or Software-Defined Wide Area Network, is used to simplify the management and optimization of wide area networks (WANs) across multiple locations. It enhances the traditional WAN by centralizing network control through software, allowing organizations to dynamically route traffic based on application requirements and network conditions. SD-WAN is used to improve application performance, enhance security, and reduce costs by intelligently utilizing multiple network connections, including MPLS, broadband internet, and LTE.
The purpose of an SD-WAN is to provide organizations with greater agility, flexibility, and control over their network infrastructure. By decoupling network hardware from its control mechanism, SD-WAN enables centralized management and orchestration of network traffic and policies. This approach simplifies network operations, accelerates deployment of new sites or applications, and enhances overall network performance and reliability.
The main difference between WAN and SD-WAN lies in their management and operational approach. WAN traditionally relies on dedicated hardware like routers and leased lines to connect geographically dispersed locations. It typically involves static configurations and manual management of network policies. In contrast, SD-WAN leverages software-defined networking principles to virtualize network functions, automate traffic routing, and apply policies dynamically based on real-time conditions. SD-WAN enhances scalability, resilience, and adaptability compared to traditional WAN architectures.
The main benefit of SD-WAN is its ability to optimize network performance while reducing costs. By intelligently routing traffic over multiple network connections, SD-WAN improves application responsiveness and user experience. It allows organizations to prioritize critical applications, such as voice and video conferencing, over less latency-sensitive traffic. Additionally, SD-WAN reduces reliance on expensive MPLS circuits by incorporating cost-effective broadband internet and LTE connections, thereby lowering operational expenses associated with WAN connectivity.