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