{HEAD ~ Information} identifying a connection is hashed to {TAIL ~ a hash value} using the hash function 
is hashed to
{ HEAD ~ Information } identifying a connection is hashed to { TAIL ~ a hash value } using the hash function
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH