In this post, you’ll learn more about the Windows Socket Error WSA_QOS_EFILTERCOUNT
11021 returned by the WSAGetLastError function in Windows as well a quick description about the error
Windows Socket Error Code
WSA_QOS_EFILTERCOUNT
11021
Windows Socket Error Description
Incorrect QoS filter count.
An incorrect number of QoS FILTERSPECs were specified in the FLOWDESCRIPTOR.