SASE Defined
Secure Access Service Edge (SASE), coined by Gartner, converges SD-WAN, firewall-as-a-service (FWaaS), cloud access security broker (CASB), secure web gateway (SWG), and Zero Trust Network Access (ZTNA) into a unified, cloud-delivered platform. It eliminates the need for backhauling traffic to centralized data centers for security inspection.
Core Components
A complete SASE stack includes SD-WAN for intelligent transport, ZTNA for identity-based access, SWG for web filtering, CASB for SaaS visibility, and FWaaS for network-level threat prevention. Leading implementations also include data loss prevention (DLP) and remote browser isolation (RBI).
Why Enterprises Are Adopting SASE
The shift to hybrid work and cloud-first architectures has exposed the limitations of hub-and-spoke network designs. SASE delivers consistent security policy enforcement regardless of user location, reduces latency to cloud applications, and simplifies vendor management by consolidating multiple point solutions.
Deployment Considerations
SASE is not a single product purchase. Enterprises should evaluate single-vendor vs. best-of-breed approaches, plan for phased migration from existing security stacks, and ensure the SASE provider has PoPs close to their users and cloud resources for optimal performance.