问题：

[多选] Which three statements are true about DAI？（）

A . DAI intercept all ARP packets on untrusted ports
B . DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the DHCP Snooping database.
C . DAI is used to prevent against a DHCP Snooping attack.
D . DAI forwards all ARP packets received on a trusted interface without any checks.
E . DAI forwards all ARP packets on untrusted ports.
F . DAI determines the validity of an ARP packet based on the valid MAC address-to-IP address bindings stored in the CAM table.