In particular, {HEAD ~ the network device} receives security classification information that maps a security class to {TAIL ~ one or more computing devices} 
In particular , { HEAD ~ the network device } receives security classification information that maps a security class to { TAIL ~ one or more computing devices }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL