4104 Braille protocol - User Port

4104 is a User Port. Transport Protocol TCP UDP , 4104 Service Name brlp-3, Service Name Description: Braille protocol.

Port	Protocol	Service Name	Description	Source
4104	TCP UDP	brlp-3	Braille protocol	IANA
4104	TCP UDP	brlp-3	Braille protocol	bekkoame

Port	Service Name	Description
557	openvms-sysipc	openvms-sysipc
2006	invokator
2168	easy-soft-mux	easy-soft Multiplexer
2275	ibridge-data	iBridge Conferencing
2312	wanscaler	WANScaler Communication Service
2367	service-ctrl	Service Control
4982		Unassigned
6298		Unassigned
7872		Reserved
8430		Unassigned

A port is an endpoint of communication in an operating system. While the term is also used for hardware devices, in software it is a logical construct that identifies a specific process or a type of service.

Port numbers are assigned in various ways, based on three ranges: System Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535);

The Well Known Ports 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. Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port". To the extent possible, these same port assignments are used with the UDP [RFC768]. The range for well-known ports managed by the IANA is 0-1023.
DYNAMIC AND/OR PRIVATE PORTS Registered Ports are those from 1024 through 49151.
The Dynamic and/or Private Ports are those from 49152 through 65535