541 uucp-rlogin - System Port | Service Name:uucp-rlogin

541 is a System Port. Transport Protocol TCP UDP , 541 Service Name uucp-rlogin, Service Name Description: uucp-rlogin.

Port	Protocol	Service Name	Description	Source
541	TCP UDP	uucp-rlogin	uucp-rlogin	IANA
541	TCP UDP	uucp-rlogin	uucp-rlogin	bekkoame

Port	Service Name	Description
860	iscsi	iSCSI
949		Unassigned
1747	ftrapid-2	ftrapid-2
2626	gbjd816	gbjd816
2817	nmsigport	NMSig Port
3898	senip	IAS, Inc. SmartEye NET Internet Protocol
3972	iconp	ict-control Protocol
4012	pda-gate	PDA Gate
4565		Unassigned
4714		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