Based on the application of {HEAD ~ the set} of {TAIL ~ patterns}, the network device forwards the network traffic 
of
Based on the application of { HEAD ~ the set } of { TAIL ~ patterns } , the network device forwards the network traffic
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