{TAIL ~ Tagging} can be used in lieu of tunneling, tagging a frame comprising {HEAD ~ a VPLS}, or a MPLS identifier 
{ TAIL ~ Tagging } can be used in lieu of tunneling , tagging a frame comprising { HEAD ~ a VPLS } , or a MPLS identifier
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH