SASE, or Secure Access Service Edge, is a cloud-native architecture that combines software-defined wide-area networking (SD-WAN) and multiple security services, including secure web gateways (SWG), cloud access security brokers (CASB), firewall-as-a-service (FWaaS), and zero trust network access (ZTNA) into a single, unified, cloud-delivered platform.
This approach decentralises both networking and security functions, moving them away from traditional centralised data centres to distributed cloud points of presence. SASE provides scalable, efficient, and secure cloud access to applications and data from any location, supporting modern remote and hybrid work environments while improving performance and reducing complexity.