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 Nostr Web Services (NWS): Enable TCP on Nostr

Nostr Web Services (NWS) replaces the IP layer in TCP transport using Nostr, enabling a secure connection between clients and backend services. Exit nodes are reachable through their nprofiles, which are combinations of a Nostr public key and multiple relays.

https://www.nobsbitcoin.com/introducing-nostr-web-services-nws/ 
 Cool oh so cool! 
 How does it replace the IP layer? Don't the client to relay and host to relay connection still need to use TCP/IP? 
 Layers can be stacked on top of each other. It establishes a TCP connection without IP, but all of it runs on TCP/IP eventually. 
 That makes sense, being able to do socks5 and websockets without IP would be impressive.