Zero Trust Network Access (ZTNA) regulates access to applications. It verifies users and devices before every application session. ZTNA confirms the users and devices if they meet the organization´s policy to access the application. As more users continue to work from anywhere, IoT devices deluge networks and operating environments. Thus, constant verification of users and devices is necessary as they access company applications and information. Network administrators should implement a zero-trust access approach and apply the principle of least privilege (PoLP) to protect networks and applications. Zero-trust access requires strong authentication capacity, robust network access control solutions, and ubiquitous application access policies.