During DHCP, what client message initiates the process to obtain an IP address?

During DHCP, what client message initiates the process to obtain an IP address?

• A. A broadcast DHCPDISCOVER
• B. A DHCPACK from the client
• C. A DHCPRELEASE from the client
• D. A DHCPREQUEST after receiving an offer

Answer: (A)

The thing being tested is how a DHCP client begins the process of obtaining an IP address. It starts by sending a broadcast DHCPDISCOVER because the client has no IP yet and can’t reach a specific server. This broadcast reaches any DHCP server on the local network, inviting them to offer an IP configuration. Servers that can provide addressing respond with a DHCPOFFER, offering an IP and settings. The client then chooses one offer and sends a DHCPREQUEST to confirm the choice, and the server replies with DHCPACK to finalize the lease. A DHCPRELEASE is used later to release an IP, and a DHCPACK is the server’s confirmation, not the initiation. The initial broadcast Discover is what begins the process because it allows discovery without prior IP information.

The thing being tested is how a DHCP client begins the process of obtaining an IP address. It starts by sending a broadcast DHCPDISCOVER because the client has no IP yet and can’t reach a specific server. This broadcast reaches any DHCP server on the local network, inviting them to offer an IP configuration. Servers that can provide addressing respond with a DHCPOFFER, offering an IP and settings. The client then chooses one offer and sends a DHCPREQUEST to confirm the choice, and the server replies with DHCPACK to finalize the lease. A DHCPRELEASE is used later to release an IP, and a DHCPACK is the server’s confirmation, not the initiation. The initial broadcast Discover is what begins the process because it allows discovery without prior IP information.