<NetworkiNg> A Name=LexikoN&file=search&eid=1&query=UDP">TCP or {UDP {port">UDP">TCP or {UDP {port with a Number iN the raNge 0-1023 (origiNally 0-255). The well-kNowN port Numbers are assigNed by the IANA aNd oN most systems caN oNly be used by system (or root) processes or by programs executed by privileged users. (2002-10-06)