free_port               Retrieve a Transmission Control Protocol (TCP)
                        port that is not currently in use
free_ports              Retrieve many (not all) Transmission Control
                        Protocol (TCP) ports that are not currently in
                        use
netstat                 Retrieve the output of the 'netstat' command
                        line utility
parse_netstat           Parse the output of the 'Netstat' command line
                        utility - obtained via netstat()
ports_in_use            Obtain the TCP ports currently in use
unassigned_ports        Obtain a list of the largest ranges of
                        unassigned Transmission Control Protocol (TCP)
                        ports as provided by the Internet Assigned
                        Numbers Authority (IANA)
