The representative value may be associated with a request prior to {HEAD ~ the request} being processed by {TAIL ~ at least one network server} 
The representative value may be associated with a request prior to { HEAD ~ the request } being processed by { TAIL ~ at least one network server }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL