{TAIL ~ The network processor} is communicatively coupled to the ingress module and {HEAD ~ the egress module} 
{ TAIL ~ The network processor } is communicatively coupled to the ingress module and { HEAD ~ the egress module }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD