SD-WAN (Software-Defined WAN) Home Cybersecurity Dictionary SD-WAN (Software-Defined WAN) SD-WAN has found application within enterprises that have a significant branch office footprint to simplify the deployment and management of network services across its many locations. In addition, it can lower bandwidth costs by reducing the reliance on expensive Multiple Protocol Label Switching (MPLS) links. SD-WAN can also serve as the foundation from which service providers can offer other value-added services such as firewall-as-a-service. The goal of SDN is to improve network control by enabling enterprises and service providers to respond quickly to changing business requirements. Related Terms Share: Seeking Clarity? View the Cybersecurity Dictionary for top terms searched by your peers. Back to the Dictionary How Can We Help? Let us know what you need, and we will have an Optiv professional contact you shortly.