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.