The apparatus includes a data packet receiver for receiving a data packet and {HEAD ~ a processor} for determining {TAIL ~ the destination} of the data packet 
The apparatus includes a data packet receiver for receiving a data packet and { HEAD ~ a processor } for determining { TAIL ~ the destination } of the data packet
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH