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