Microsoft Windows Vista and Microsoft Windows Server 2008 may report incorrect ping statistics for a response similar to "Destination Host Unreachable"

Source: Microsoft Support

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On Microsoft Windows Vista and Microsoft Windows Server 2008, when you ping another�host on the network and receive�a failure result such as�"Destination�Host Unreachable," you may receive a statistic report that shows 0% packet loss, despite none of the packets having reached the host successfully.

This is a known issue in Microsoft Windows Vista and Microsoft Windows Server 2008.