What is the main function of DHCP Discover packets?
A. The client sends DHCP Discover packets for requesting to confirm the configuration or renew the lease time of the IP address.
B. The DHCP server sends DHCP Discover packets to respond DHCP Request packets.
C. The DHCP Discover packet carries various configuration information.
D. The client sends DHCP Discover packets to search for the DHCP server.