A connexion type defines a local use of a standard network application protocol (protocol and port number) which can be override and completed by source port number restriction and transport protocol (TCP, UDP).

A standard is a definition or format that has been approved by a recognized standards organization or is accepted as a de facto standard by the industry.

A network application protocols supported by a communication port must be compatible with the protocols supported by communication ports to which they are connected.

A network protocol is a set of standardized rules for transmission of information (voice, data, images) on a communication channel. The different layers of protocols can handle the detection and processing of errors, authentication of correspondents, management of routing.