From a logical point of view, this is the number of
TCP/UDP flows resulting from packets received which
matched this Wildcard Affinity.
A flow is a sequence of IP packets from a specific
client to a specific real server going through this
Forwarding Agent.
Literally this is the current number of Fixed Affinity
entries in the Fixed Affinity cache, that were put
there as a result of packets matching this Wildcard
Affinity.