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What is dnsrslvr.dll?

Part of DNS Caching Resolver Service by Microsoft

What is it?

The caching resolver reduces DNS network traffic and speeds name resolution by providing a local cache for DNS queries.
Description of dnsrslvr.dll from Microsoft
Name query responses are cached for the TTL specified in the response (not to exceed the value specified in the MaxCacheEntryTtlLimit registry entry (HKLM\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters)), and future queries are answered from cache when possible. DNS Resolver Cache Service supports negative caching. For example, if a query is made to a DNS for a particular host name and the response is negative, succeeding queries for the same name will be answered (negatively) from the cache for an amount of time equal to the value in the NegativeCacheTime registry entry (HKLM\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters) (the default value is 300 seconds).
(dnsrslvr.dll is a system file that is installed with Windows)
Download Boost (100% FREE) Speed up DNS Caching Resolver Service and optimize your PC.

How is dnsrslvr.dll loaded?

Hosted service - dnsrslvr.dll is typically associtated with identifier name of 27c6d03bcdb8cfeb96b716f3d8be3e18 with and identifier of Dnscache. A Windows Hosted Service is a service that is implemented as dynamically-linked library (DLL) run under the (Service Host) SvcHost process.
DNS Caching Resolver Service is loaded by:

Community

What is the community is seeing?What is the community is doing?
About 0.3% of all Boost users have the dnsrslvr.dll file.Of the 0.3% of dnsrslvr.dll users, less than 1% have disabled it.
How resource intensive is the loaded module dnsrslvr.dll?
Comparison based on the average resource utilization across all programs.
                              0.00046605% CPU38.8%
Average thread CPU utilization across all loaded modules is 0.00120%.
     1 context switches/sec6.7%
Average context switches for all programs is 15 per second.
Typical file (disk image) location:
C:\Windows\System32\dnsrslvr.dll

Are there other versions of DNS Caching Resolver Service?

What else is related?

What Windows OS versions does this run on?

Windows 8.1 (6.2.9200.0)
Windows 8.1 Enterprise Evaluation (6.2.9200.0)
Windows 8.1 Pro (6.2.9200.0)
Windows 8.1 Pro with Media Center (6.2.9200.0)
Windows 8.1 Single Language (6.2.9200.0)

About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: dnsrslvr.dll
Publisher: Microsoft Corporation (verified)
Name: DNS Caching Resolver Service
Description: Microsoft® Windows® Operating System
Version: 6.3.9600.16384 (winblue_rtm.130821-1623)
Product version: 6.3.9600.16384
Size: 248.5 KB
Original file name: dnsrslvr.dll
Windows file protection: Yes

Resource utilization

Total CPU: 0.0004660490%
Privileged CPU: 0.0003313457%
User CPU: 0.0001347033%
CPU Cycle count /sec: 11,292
Context switches /sec: 1
Module memory size: 264 KB

Hosted service details

Name: e4ca434f251681590d0538bc21c32d2f
Command: Dnscache

Image hashes

MD5: fe7656474448be6a6c68e5c9beb7ca94
SHA-1: 13e71a0870fedda2c2e535296b4404f08a93a41b

PE image details

Subsystem: Windows GUI
Langauge*: Microsoft Visual C++
File packed: No
Import Table
advapi32.dll
api-ms-win-core-crt-l1-1-0.dll
api-ms-win-core-crt-l2-1-0.dll
api-ms-win-core-debug-l1-1-1.dll
api-ms-win-core-delayload-l1-1-1.dll
api-ms-win-core-errorhandling-l1-1-0.dll
api-ms-win-core-errorhandling-l1-1-1.dll
api-ms-win-core-file-l1-1-1.dll
api-ms-win-core-file-l1-2-0.dll
api-ms-win-core-file-l1-2-1.dll
api-ms-win-core-handle-l1-1-0.dll
api-ms-win-core-heap-l1-1-0.dll
api-ms-win-core-heap-l1-2-0.dll
api-ms-win-core-heap-obsolete-l1-1-0.dll
api-ms-win-core-interlocked-l1-1-0.dll
api-ms-win-core-interlocked-l1-1-1.dll
api-ms-win-core-interlocked-l1-2-0.dll
api-ms-win-core-libraryloader-l1-1-1.dll
api-ms-win-core-libraryloader-l1-2-0.dll
api-ms-win-core-localization-l1-1-1.dll
api-ms-win-core-localization-l1-2-0.dll
api-ms-win-core-localization-l1-2-1.dll
api-ms-win-core-processenvironment-l1-1-0.dll
api-ms-win-core-processenvironment-l1-1-1.dll
api-ms-win-core-processenvironment-l1-2-0.dll
api-ms-win-core-processthreads-l1-1-1.dll
api-ms-win-core-processthreads-l1-1-2.dll
api-ms-win-core-profile-l1-1-0.dll
api-ms-win-core-registry-l1-1-0.dll
api-ms-win-core-string-l1-1-0.dll
api-ms-win-core-synch-l1-1-1.dll
api-ms-win-core-synch-l1-2-0.dll
api-ms-win-core-sysinfo-l1-1-1.dll
api-ms-win-core-sysinfo-l1-2-0.dll
api-ms-win-core-sysinfo-l1-2-1.dll
api-ms-win-core-threadpool-l1-1-1.dll
api-ms-win-core-threadpool-legacy-l1-1-0.dll
api-ms-win-core-timezone-l1-1-0.dll
api-ms-win-core-util-l1-1-0.dll
api-ms-win-obsolete-kernelbase-l1-1-0.dll
api-ms-win-security-base-l1-1-0.dll
api-ms-win-security-base-l1-2-0.dll
api-ms-win-security-sddl-l1-1-0.dll
api-ms-win-service-core-l1-1-1.dll
dhcpcsvc.dll
dhcpcsvc6.dll
dnsapi.dll
iphlpapi.dll
kernel32.dll
msvcrt.dll
nsi.dll
ntdll.dll
rpcrt4.dll
user32.dll
winnsi.dll
ws2_32.dll
Export Table
loadgpextension
reg_doregisteradapter
servicemain
svchostpushserviceglobals
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