During the operation of the DHCP protocol, what conditions will use DHCP REQUEST messages? (Multiple Choice)
A . After the client is initialized, the broadcast DHCP REQUEST packet is sent to respond to the DHCP OFFER packet of the server.
B . When the client finds that the IP address assigned to it by the server conflicts, it will notify the server by sending this message, and will re-address the address to the server.
C . When the client has been bound to an IP address. Send a DHCP REQUEST packet to update the lease of the IP address
D . After the client restarts, it sends a broadcast DHCP REQUEST message to confirm the configuration information such as the previously assigned IP address.
Answer: ACD