You are confusing connection-oriented phase of x.25 with “streams”. X.25 is a “packet-switched” “connection-oriented” protocol. [which p.s. makes sense for tr

You are confusing connection-oriented phase of x.25 with “streams”. X.25 is a “packet-switched” “connection-oriented” protocol. [which p.s. makes sense for traditional telecom’s view of the world, which as you know is circuit-switched. One of the main beefs of telcos in regards to IP was traffic management. Compare X.25 congestion management with IP. ] Some kind soul has delved into the details of modalities of networking protocols: https://stackoverflow.com/a/43543284 https://stackoverflow.com/a/43543284