What is "IP Helper" in my Windows XP service list? And how is "IP Helper" service related to iphlpsvc.dll?

"IP Helper" is a Windows XP service that "Provides tunnel connectivity using IPv6 transition technologies (6to4, ISATAP, Port Proxy, and Teredo), and IP-HTTPS. If this service is stopped, the computer will not have the enhanced connectivity benefits that these technologies offer." "IP Helper" service is provided by iphlpsvc.dll DLL file.

Detailed information on "IP Helper" service:

Service name: iphlpsvc
Display name: IP Helper
Execution command: C:\Windows\System32\svchost.exe -k NetSvcs
Start type: Manual
Service status: Started
Dependencies:
   NetIO Legacy TDI Support Driver
   Network Store Interface Service
   Remote Procedure Call (RPC)
   TCP/IP Protocol Driver
   Windows Management Instrumentation

"IP Helper" service is provided by a DLL file called: iphlpsvc.dll:

Name: iphlpsvc.dll
Location: C:\Windows\System32\iphlpsvc.dll
Description: service that offers ipv6 connectivity over an ipv4 network
File version: 6.1.7601.17514
Size: 488 KB (499,712 bytes)
Modified: Saturday, November 20, 2010, 7:19:23 AM

Disabling "IP Helper" service may cause issues when running Windows XP system.

⇒"svchost.exe -k netsvcs" Services on Windows XP

⇒⇒Windows XP Services Tutorials