1191 General Parallel File System - User Port

1191 is a User Port. Transport Protocol TCP UDP , 1191 Service Name gpfs, Service Name Description: General Parallel File System.

Port	Protocol	Service Name	Description	Source
1191	TCP UDP	gpfs	General Parallel File System	IANA
1191	TCP UDP	gpfs	General Parallel File System	bekkoame

Port	Service Name	Description
837		Unassigned
1232	first-defense	Remote systems monitoring
1656	dec-mbadmin-h	dec-mbadmin-h
1935	macromedia-fcs	Macromedia Flash Communications server MX
2947	gpsd	GPS Daemon request/response protocol
4400	ds-srv	ASIGRA Services
5026	strexec-d	Storix I/O daemon (data)
6024	x11	X Window System
6056	x11	X Window System
6559		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