{HEAD ~ This information} is relayed using the Network layer to provide {TAIL ~ feedback} to the MAC layer in order to improve the end to end performance of VoIP services 
{ HEAD ~ This information } is relayed using the Network layer to provide { TAIL ~ feedback } to the MAC layer in order to improve the end to end performance of VoIP services
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH