In an exemplary embodiment a request/reply network messaging scheme is utilized wherein {TAIL ~ either} of the two access points initially transmits {HEAD ~ a test request}, and in response the receiving access point issues a test reply 
In an exemplary embodiment a request / reply network messaging scheme is utilized wherein { TAIL ~ either } of the two access points initially transmits { HEAD ~ a test request } , and in response the receiving access point issues a test reply
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH