The DPE may be comprised of hardware or software elements and have associated with it a mechanism for applying a rule or {HEAD ~ a set} of {TAIL ~ rules} to packets either transmitted or received at the lowest layer at which the packets exist 
of
The DPE may be comprised of hardware or software elements and have associated with it a mechanism for applying a rule or { HEAD ~ a set } of { TAIL ~ rules } to packets either transmitted or received at the lowest layer at which the packets exist
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH