olemus
võrguport numbriga vahemikust 1024-49151,
mille IANA on valmistajaile määranud kasutamiseks
teatud protokollides või rakendustes
= a network port (its number being in the range of 1024--49151) assigned by the IANA for use in certain protocols or applications

ülevaateid
https://superuser.com/questions/956226/what-are-the-differences-between-the-3-port-types

https://en.wikipedia.org/wiki/Registered_port

https://ipinfo.info/html/tcp-ip-ports.php

https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt