Regarding AAL5:
A.
An AAL3/4 cell has more payload per cell than an AAL5 cell.
B.
The AAL5 Cell has 47 bytes of payload. An extra byte is used to determine the EOF.
C.
The trailer in an AAL5 frame has a 4 byte CRC.
D.
An AAL5 Frame is padded to nx48 bytes to ease SAR.
E.
An AAL5 Frame has a trailer and a header .