RFC9293 – Transmission Control Protocol (TCP). August 2022 (englisch).
RFC7323 – TCP Extensions for High Performance. September 2014 (englisch).
RFC793 – Transmission Control Protocol. 1981 (englisch).
RFC793 – Transmission Control Protocol. 1981, S. 11 (englisch). “A passive OPEN request means that the process wants to accept incoming connection requests rather than attempting to initiate a connection.”
RFC793 – Transmission Control Protocol. 1981, S. 21 (englisch). “Briefly the meanings of the states are: LISTEN – represents waiting for a connection request from any remote TCP and port.”
Steven M. Bellovin: RFC1948 – Defending Against Sequence Number Attacks. 1996 (englisch).
RFC1122 – Requirements for Internet Hosts – Communication Layers. Oktober 1989 (englisch).