694 ha-cluster - System Port | Service Name:ha-cluster

694 is a System Port. Transport Protocol TCP UDP , 694 Service Name ha-cluster, Service Name Description: ha-cluster.

Port	Protocol	Service Name	Description	Source
694	TCP UDP	ha-cluster	ha-cluster	IANA
694	TCP UDP		Linux-HA High availability Heartbeat,Official	wikipedia
694	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
694	TCP UDP	ha-cluster	ha-cluster	bekkoame

Port	Service Name	Description
2237	optech-port1-lm	Optech Port1 License Manager
2448	hpppssvr	hpppsvr
3872	oem-agent	OEM Agent
4037	ravehd	RaveHD network control
4591	l3t-at-an	HRPD L3T (AT-AN)
4605		Unassigned
5253	kpdp	Kohler Power Device Protocol
6594		Unassigned
7743	sstp-1	Sakura Script Transfer Protocol
8537		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