Is there a technical name for VPNs like ZeroTier (Tinc, n2n, ...)?

While I enjoy the remote access and virtual LAN chat rooms powered by ZeroTier, I am curious about why ZeroTier is referred to by so many names ( SDWAN , VLAN , ZeroTrust , Ad-hoc VPN , Secure LAN , Virtual Ethernet Switch , etc.) on the Internet, and whether there is a technical definition of what it does. My question is: Is there a formal technical name for the functionalities of ZeroTier (like “Site-to-site VPN”), or is it a too narrow use case to be named? To be specific, the points are: Connect neither two sites (Site-to-Site) nor a physical remote site (Remote-Access). All peers join a v

Question by w568w on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.