The protocol supports a memory subsystem which queues memory requests such that the processor, or cache memory requesting {TAIL ~ data}, relinquishes the shared bus after making {HEAD ~ its request} 
The protocol supports a memory subsystem which queues memory requests such that the processor , or cache memory requesting { TAIL ~ data } , relinquishes the shared bus after making { HEAD ~ its request }
OTH OTH OTH OTH OTH 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