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