Port 834 Unassigned - System Port

Port 834 is a System Port. Transport Protocol , Port 834 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
834			Unassigned	IANA
834	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com

Port	Service Name	Description
510	fcp	FirstClass Protocol
2580	tributary	Tributary
2587	masc	MASC
2613	smntubootstrap	SMNTUBootstrap
3607	precise-i3	Precise I3
6421	nim-wan	NIM_WAN
6503	boks-clntd	BoKS Clntd IANA assigned this well-formed service name as a replacement for "boks_clntd".
6528		Unassigned
6919		Unassigned
7695		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