What is "DNS Client" in my Windows XP service list? And how is "DNS Client" service related to dnsrslvr.dll?

"DNS Client" is a Windows XP service that "The DNS Client service (dnscache) caches Domain Name System (DNS) names and registers the full computer name for this computer. If the service is stopped, DNS names will continue to be resolved. However, the results of DNS name queries will not be cached and the computer's name will not be registered. If the service is disabled, any services that explicitly depend on it will fail to start." "DNS Client" service is provided by dnsrslvr.dll DLL file.

Detailed information on "DNS Client" service:

Service name: Dnscache
Display name: DNS Client
Execution command: C:\Windows\system32\svchost.exe -k NetworkService
Start type: Manual
Service status: Started
Dependencies:
   NetID Legacy TDI Support Driver
   Network Store Interface Service

"DNS Client" service is provided by a DLL file called: dnsrslvr.dll:

Name: dnsrslvr.dll
Location: C:\Windows\System32\dnsrslvr.dll
Description: DNS Caching Resolver Service
File version: 6.1.7601.17570
Size: 129 KB (132,608 bytes)
Modified: Thursday, March 03, 2011, 12:38:01 AM

Disabling "DNS Client" service may cause issues when running Windows XP system.

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

⇒⇒Windows XP Services Tutorials