Final answer:
The correct sequence of DHCP messages is DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, and DHCPACK. 'D. DHCPCONFIGURE' is not a valid DHCP message.
Step-by-step explanation:
The correct sequence of DHCP messages when a client machine is trying to get an IP address from a DHCP server is as follows:
- DHCPDISCOVER
- DHCPOFFER
- DHCPREQUEST
- DHCPACK
A DHCP client first sends a DHCPDISCOVER message to initiate contact with a DHCP server. The server responds with a DHCPOFFER message, offering an IP address to the client. The client then sends a DHCPREQUEST message to request the offered IP address. Finally, if the server accepts the request, it sends a DHCPACK message, acknowledging the transaction and providing the client with the necessary lease information.
Answering the multiple-choice question, 'DHCPDISCOVER', 'DHCPOFFER', and 'DHCPREQUEST' are valid DHCP messages, making 'D. DHCPPCONFIGURE' the correct answer as it is not a standard DHCP message.