In general, {TAIL ~ techniques} are described for hierarchical application of {HEAD ~ security services} with a network device 
In general , { TAIL ~ techniques } are described for hierarchical application of { HEAD ~ security services } with a network device
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH