According to the present invention, adaptor cards or drivers for installation in a network include {HEAD ~ a simple data pattern enforcer} operating at the lowest layer at which {TAIL ~ packets} are recognized 
According to the present invention , adaptor cards or drivers for installation in a network include { HEAD ~ a simple data pattern enforcer } operating at the lowest layer at which { TAIL ~ packets } are recognized
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH