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