Microsoft TCP/IP-32 for Windows for Workgroups
The Microsoft TCP/IP-32 version 3.11b (TCP32B.EXE) 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 (WFWT32.EXE) and contains all components of the product. 

This product is compatible with and supported exclusively on Windows for Workgroups version 3.11. If you are running a different TCP/IP product on your computer, you must remove it before installing Microsoft TCP/IP-32. For information on this TCP/IP-32 Update, please see the following article in the Microsoft Knowledge Base: 
122544 UPDATE.TXT: TCP/IP-32 3.11b for Windows for Workgroups