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
Answer: ABCD