Zero Trust Network Access (ZTA) and zero trust network access (ZTNA) often are used interchangeably. With so many similar terms and acronyms floating around, its important to make sure you understand what a vendor is actually talking about when you’re discussing solutions. The concept of zero trust came about because the old network security model of inside means trusted and outside means untrusted no longer works. With zero trust, network location or IP address no longer conveys an implication of trust.”]
Source: https://www.fortinet.com/blog/ciso-collective/whats-the-difference-between-zero-trust-zta-ztna