499 ISO ILL Protocol - System Port | Service Name:iso-ill

499 is a System Port. Transport Protocol TCP UDP , 499 Service Name iso-ill, Service Name Description: ISO ILL Protocol.

Port	Protocol	Service Name	Description	Source
499	TCP UDP	iso-ill	ISO ILL Protocol	IANA
499	TCP UDP	iso-ill	ISO ILL Protocol	bekkoame

Port	Service Name	Description
2503	nms-dpnss	NMS-DPNSS
2836	catalyst	catalyst
3230	sftdst-port	Software Distributor Port
4983		Unassigned
6914		Unassigned
7306	swx	The Swiss Exchange
7466		Unassigned
8028		Unassigned
8214		Unassigned
9761		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