Which kind of message is sent by a DHCP client when its IP address lease has expired?
- a DHCPDISCOVER broadcast message
- a DHCPREQUEST broadcast message
- a DHCPREQUEST unicast message
- a DHCPDISCOVER unicast message
Answers Explanation & Hints: When the IP address lease time of the DHCP client expires, it sends a DHCPREQUEST unicast message directly to the DHCPv4 server that originally offered the IPv4 address.