{HEAD ~ The data} is forwarded from {TAIL ~ the network switch} based on the processing performed by the dedicated modules 
is forwarded from
{ HEAD ~ The data } is forwarded from { TAIL ~ the network switch } based on the processing performed by the dedicated modules
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH