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Difficulty: EasyDHCP Server, Client, and Relay Agent Operation and Configuration

A client workstation is configured to obtain IPv4 addressing dynamically. Arrange the four messages exchanged during the standard DHCP lease process (DORA) in chronological order from first to last.

  1. 1DHCPDISCOVER: The client broadcasts a message to locate available DHCP servers on the local network segment.
  2. 2DHCPOFFER: A DHCP server responds with an offered IPv4 address, subnet mask, default gateway, and lease duration.
  3. 3DHCPREQUEST: The client broadcasts a message accepting the offered IP address and notifying other DHCP servers.
  4. 4DHCPACK: The selected DHCP server sends a confirmation message to finalize the lease agreement.

Answer

The chronological sequence of the IPv4 DHCP operation is DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, and DHCPACK.
The standard IPv4 DHCP lease negotiation process follows the four-step DORA sequence: Discover (client broadcast), Offer (server response), Request (client selection broadcast), and Acknowledge (server confirmation).

Step-by-Step Solution

1
Identify the initial client discovery broadcast.
DHCPDISCOVER is sent first by the client.
The client has no assigned IP address and must broadcast to discover active DHCP servers.
2
Identify the server offer response.
DHCPOFFER is sent second by the server.
A server receiving the discovery broadcast offers an available IP address and subnet parameters.
3
Identify the client acceptance broadcast.
DHCPREQUEST is sent third by the client.
The client broadcasts its intent to accept the specific offer, allowing unselected servers to release their reserved offers.
4
Identify the server final acknowledgment.
DHCPACK is sent fourth by the server.
The server acknowledges the request and locks in the IP lease parameters for the client.

Key Concept

DHCP DORA Process (Discover, Offer, Request, Acknowledge)
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Topics

DHCP Server, Client, and Relay Agent Operation and Configuration

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