CompTIA Network+ (N10-009)Network OperationsEasy
A network technician is explaining to a junior colleague how a client obtains an IP address from a DHCP server. Which sequence correctly describes this process?
- ARequest, Discover, Acknowledge, Offer
- BAcknowledge, Request, Discover, Offer
- CDiscover, Offer, Request, Acknowledge
- DOffer, Discover, Acknowledge, Request
Show answer & explanationAnswer & explanation
Correct answer: C. Discover, Offer, Request, Acknowledge
DHCP uses the DORA process: the client broadcasts a DHCPDISCOVER, the server responds with a DHCPOFFER, the client sends a DHCPREQUEST for the offered address, and the server confirms with a DHCPACK.
Why the other options are wrong
- A. Reverses the discover/request steps, breaking the handshake.
- B. Completely reverses the correct sequence.
- D. Places offer before discover, which is impossible since the server hasn't heard from the client.
DHCP DORA Process
The four-step handshake (Discover, Offer, Request, Acknowledge) used by DHCP clients to lease an IP address.
- DHCPDISCOVER is broadcast by the client
- DHCPOFFER and DHCPACK come from the server
- DHCPREQUEST confirms the client wants the offered lease
Memory trick: Do Or Really Ask — DORA gets you an IP.