|This article does not cite any references or sources. (December 2009)|
Network Utility performing a ping on en.wikipedia.org
|Stable release||1.5 (85) / July 20, 2011|
|Operating system||Mac OS X|
Port scan 
Network Utility uses the tools supplied in the unix directories for most of its functions, however for the port scan it uses a unix executable in its resources folder, stroke, found at /Applications/Utilities/Network Utility.app/Contents/Resources/stroke.
Performing a DNS lookup on en.wikipedia.org
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