Which three options are supported as address allocation mechanisms for DHCP on Cisco routers?（）

• A、The IP address can be automatically assigned to a host.
• B、The IP address can be assigned as a random hash value of the burned - in - address of the lowest - numbered LAN interface on the router.
• C、The network administrator can assign a speci fic IP address to a specific host MAC address.
• D、The IP address can be assigned from configured pools in a reverse lexicographical order.
• E、The IP address can be assigned to a host for a limited time or until the host explicitly releases the address.
• F、The IP address can be assigned to a host until the host usurps the assigned value using its own dynamic override mechanism.