Secure Access Service Edge (SASE) is a cloud-based architecture that combines various cloud security and infrastructure enablement technologies into a unified platform that delivers security and networking services from the edge of the network. Two of these technologies are Zero Trust Network Access (ZTNA) and Cloud Access Security Broker (CASB). ZTNA is a technology that provides secure access to private applications without exposing them to the internet or using VPNs. It uses identity-based policies and encryption to grant granular access to authorized users and devices, regardless of their location or network. CASB is a technology that provides visibility and control over cloud applications (SaaS) used by users and devices. It uses API connections or inline proxies to inspect and enforce policies on data and activities in cloud applications, such as data loss prevention, threat protection, or compliance. Distributed Denial of Service Protection (DDoS) and Unified Threat Management (UTM) are not technologies that SASE combines into its unified platform, although they may be related or integrated with some of its components. References: [SASE], [ZTNA], [CASB].