For the understanding of packet switching mode, the correct one in the following statement is ______ . (Multiple choices)

For the understanding of packet switching mode, the correct one in the following statement is ______ . (Multiple choices)
A . Packet switching is a switching method based on cut-through switching
B . The transmitted information is divided into packets of a certain length and forwarded in units of packets
C . Packet switching includes frame-based packet switching and cell-based packet switching
D . Each packet carries the address identification of the receiver and the sender, the packet can be directly forwarded without any operation, thereby improving efficiency

Answer: BC