In this post, you’ll learn more about the Windows Socket Error WSA_QOS_EPSFILTERSPEC
11028 returned by the WSAGetLastError function in Windows as well a quick description about the error
Windows Socket Error Code
WSA_QOS_EPSFILTERSPEC
11028
Windows Socket Error Description
Invalid QoS provider-specific filterspec.
An invalid FILTERSPEC was found in the QoS provider-specific buffer.