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 based on store and forward ( Store-and-Forward Switching exchange) of
B . The transmitted information is divided into packets of a certain length and forwarded in units of packets
C . Each packet carries the address identification of the receiver and the sender, the packet can be directly forwarded without any operation, thereby improving efficiency
D . Packet switching includes frame-based packet switching and cell-based packet switching

Answer: ABD

Explanation:

Check the source and destination of each packet, re-operate, and forward the packets one by one, which increases the delay but the resource utilization rate is high. Although the line is monopolized by a group at a certain moment, the line bandwidth is multiplexed After the total utilization rate is high