Ethernet is a network supporting broadcast network, once the network has a loop, this simple broadcast mechanism will lead to disastrous consequences. Which of the following phenomena may be caused by loops? (Multiple Choice)

 Ethernet is a network supporting broadcast network, once the network has a loop, this simple broadcast mechanism will lead to disastrous consequences. Which of the following phenomena may be caused by loops? (Multiple Choice)
A . The device cannot log in remotely
B .  When using the DISPLAY INTERFACE command on the device to view the interface statistics, it is found that the interface has received many broadcast-packets
C . CPU usage exceeds 70%
D .  Severe packet loss during network testing through the PING command

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Answer: ABCD