File Transfer Protocol - Wikipedia

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March 24, 2004; Read 1,382,946 times Web servers typically bind to the TCP port 80, which is what the http protocol uses by default, and then will wait and listen for connections from remote 24 TCP Function System (zsh) 24.2.1 Basic I/O tcp_open [ -qz] host port [ sess] tcp_open [ -qz] [ -s sess | -l sess[,] tcp_open [ -qz] [ -a fd | -f fd] [ sess]. Open a new session. In the first and simplest form, open a TCP connection to host host at port port; numeric and symbolic forms are understood for both.. If sess is given, this becomes the name of the session which can be used to refer to multiple different TCP TCP Port Scanner, Online Port Scan, Port Scanning | IPVoid