{TAIL ~ Rate shaping}, for example during transcoding, may be performed by intermediate network entities without decrypting {HEAD ~ the layers} 
{ TAIL ~ Rate shaping } , for example during transcoding , may be performed by intermediate network entities without decrypting { HEAD ~ the layers }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD