The results of {HEAD ~ the providers processing} are sent back to the authentication engine, which then processes {TAIL ~ the results} according to the protect string to determine whether the request has been authenticated 
The results of { HEAD ~ the providers processing } are sent back to the authentication engine , which then processes { TAIL ~ the results } according to the protect string to determine whether the request has been authenticated
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH