A SASE design commonly brings together software-defined WAN connectivity with capabilities such as secure web gateways, cloud access security brokers, firewall as a service, and zero trust network access.
The aim is to apply consistent, identity- and context-aware policy even when users and applications are distributed across offices, homes, data centers, and cloud platforms. SASE is not one protocol or a guaranteed feature set: services, integration depth, traffic paths, and policy models vary substantially.
Key points
Primary purposeConnect distributed users and resources while applying security policy through a common service architecture.
Key design factorsPoints of presence, latency, private and public application access, identity integration, branch connectivity, data residency, and failure behavior.
Operating choicesImplementations may use one provider or coordinated services, but policy, identity and context, telemetry, and traffic engineering must be meaningfully integrated; procurement consolidation alone is not SASE.
Important limitationMoving enforcement to the cloud does not remove endpoint, identity, application, data, resilience, or provider-concentration risk.