** Microsoft Network Monitor 3.4 has been replaced by Microsoft Message Analyzer on Windows 7, 2008 R2, and later **

Microsoft Message Analyzer
http://blogs.technet.com/b/messageanalyzer
http://blogs.technet.com/b/messageanalyzer/archive/2013/09/25/message-analyzer-why-so-different-from-network-monitor.aspx
http://technet.microsoft.com/en-us/library/dn281851.aspx
http://www.microsoft.com/en-us/download/details.aspx?id=44226
Microsoft Message Analyzer Operating Guide
  http://technet.microsoft.com/en-us/library/jj649776.aspx

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Microsoft Network Monitor 3.4
http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=4865

Network Monitor 3.4 is a protocol analyzer. It allows you to capture network traffic and view and analyze it.
Microsoft is working on its successor, Microsoft Message Analyzer:
http://blogs.technet.com/b/messageanalyzer/archive/2012/09/17/meet-the-successor-to-microsoft-network-monitor.aspx

Supported operating systems:
Windows 7, Windows 8, Windows Server 2003 Service Pack 2, Windows Server 2003 Service Pack 2 x64 Edition, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 R2 for Itanium-based Systems, Windows Server 2012, Windows Vista 64-bit Editions Service Pack 1, Windows Vista Service Pack 1, Windows XP 64-bit, Windows XP Service Pack 3