Microsoft TCP/IP-32 TCP/IP-32 3.11b

Microsoft TCP/IP-32 version 3.11b is an update to Microsoft's TCP/IP-32, a 32-bit protected mode VxD TCP/IP network protocol stack for Windows for Workgroups version 3.11.

Release notes

The Microsoft TCP/IP-32 version 3.11b is the latest update to the TCP/IP-32 stack for Windows for Workgroups 3.11. It has been updated since version 3.11a and includes a number of fixes, primarily to provide compatibility with several third-party WinSock applications, and to correct problems with using DNS to resolve NetBIOS names. This also has updated code related to Windows 95. This update is a complete refresh of TCP/IP-32 and contains all components of the product.

The file "tcp32b.exe" in the archive below was distributed by Microsoft as a download from their FTP.

Product type
Release date
Minimum CPU
User interface
Download count
5 (5 for release)


Download name Version Language Architecture File size Downloads
Microsoft TCP-IP-32 For Windows 3.1 (3.5) 3.1 English 1MB 5


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