The answer is Discover: the client broadcasts to locate DHCP servers. This is correct because the DHCP DORA process begins with a client sending a DHCP Discover message as a Layer 2 broadcast to find any available DHCP server on the network. The server then replies with a unicast Offer, the client responds with a broadcast Request to formally accept the offered IP address, and the server finalizes with an Ack. On the CCNA 200-301 v2 exam, this question tests your understanding of the four-step DHCPv4 handshake and the specific role each message plays, often appearing in drag-and-drop or multiple-choice format. A common trap is confusing the Offer and Ack roles, or thinking the Request is unicast—it is actually a broadcast to inform all servers of the selection. To remember the order, use the mnemonic “DORA: Discover, Offer, Request, Ack,” and note that only the Offer is unicast from server to client.
CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: the DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Match each DHCPv4 message in the DORA process to its role.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Discover: Client broadcasts to locate DHCP servers
The DORA process includes Discover (client broadcast), Offer (server response), Request (client accepts), and Ack (server confirms). Additional messages like NAK and Decline handle errors.
Key principle: The DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Discover: Client broadcasts to locate DHCP servers
Why this is correct
The Discover message is sent by the client as a broadcast to find available DHCP servers on the network.
Related concept
The DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server.
✗
Discover: Server responds with an IP lease offer
Why it's wrong here
This is incorrect because the server responds with an Offer message, not a Discover. The Discover is sent by the client.
✗
Discover: Client requests the offered IP address
Why it's wrong here
This is incorrect because the client requests the IP address in the Request message, not the Discover.
✗
Discover: Server acknowledges the lease
Why it's wrong here
This is incorrect because the server acknowledges the lease in the Ack message, not the Discover.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓Discover: Client broadcasts to locate DHCP serversCorrect answer▾
Why this is correct
The Discover message is sent by the client as a broadcast to find available DHCP servers on the network.
✗Discover: Server responds with an IP lease offerWrong answer — click to see why▾
Why this is wrong here
The specific factual error is confusing the client's Discover with the server's Offer.
Why candidates choose this
Candidates may think 'Discover' implies the server discovering the client, but it is the client discovering servers.
✗Discover: Client requests the offered IP addressWrong answer — click to see why▾
Why this is wrong here
The specific factual error is attributing the Request function to the Discover message.
Why candidates choose this
Candidates might confuse the sequence and think the initial message is a request.
✗Discover: Server acknowledges the leaseWrong answer — click to see why▾
Why this is wrong here
The specific factual error is assigning the Ack function to the Discover message.
Why candidates choose this
Candidates may mix up the roles of Discover and Ack due to similar sounding names.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
Do not confuse the order or roles of DHCP messages. Remember that the client initiates with Discover, then the server Offers, the client Requests, and the server Acknowledges. The mnemonic DORA helps: Discover, Offer, Request, Ack.
Detailed technical explanation
How to think about this question
The DHCPv4 protocol automates the assignment of IP addresses and other network configuration parameters to devices on an IPv4 network. The DORA process is the core sequence of messages used between a DHCP client and server to negotiate and assign an IP address lease dynamically. It begins with the client broadcasting a DHCP Discover message to find available DHCP servers. Servers respond with a DHCP Offer message proposing an IP address and lease terms. The client then broadcasts a DHCP Request message to accept one of the offers. Finally, the server sends a DHCP Acknowledge message to confirm the lease, allowing the client to configure its interface accordingly.
Each message in the DORA process serves a specific purpose and follows a strict order to ensure reliable IP address assignment. The Discover message initiates communication and is always broadcast because the client does not yet have an IP address. The Offer message is unicast or broadcast by the server to propose an address. The Request message is broadcast by the client to inform all servers which offer it accepts, preventing multiple leases. The Acknowledge message finalizes the process by confirming the lease details. Cisco devices implement this process according to RFC standards, and understanding this sequence is essential for configuring DHCP relay agents, troubleshooting IP address conflicts, and securing DHCP traffic.
A common exam trap is confusing the roles or order of the DORA messages, such as thinking the Request message comes before the Offer or that the Acknowledge is sent by the client. This misunderstanding can lead to incorrect answers or misconfiguration in real networks. Practically, network engineers must recognize that the client initiates with Discover and accepts with Request, while the server responds with Offer and confirms with Acknowledge. This clarity helps in troubleshooting DHCP failures, configuring DHCP snooping for security, and ensuring proper IP address management in Cisco environments.
KKey Concepts to Remember
The DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server.
The DHCP Discover message is broadcast by the client to locate available DHCP servers on the network segment.
The DHCP Offer message is sent by a DHCP server to propose an IP address lease to the client after receiving a Discover message.
The DHCP Request message is broadcast by the client to indicate acceptance of a specific IP address offer from a DHCP server.
The DHCP Acknowledge message is sent by the DHCP server to confirm and finalize the IP address lease to the client.
Each DHCP message in the DORA process has a distinct role that ensures proper IP address assignment and lease negotiation.
The DORA process is fundamental for dynamic IP address allocation in IPv4 networks and is critical knowledge for CCNA security and networking domains.
Misunderstanding the order or role of DHCP messages in the DORA process can lead to incorrect troubleshooting or configuration in Cisco network environments.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
The DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server.
Real-world example
How this comes up in practice
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 200-301 question in full detail.
Review the DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server., then practise related 200-301 questions on the same topic to reinforce the concept.
Network Services and Security — This question tests Network Services and Security — The DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server..
What is the correct answer to this question?
The correct answer is: Discover: Client broadcasts to locate DHCP servers — The DORA process includes Discover (client broadcast), Offer (server response), Request (client accepts), and Ack (server confirms). Additional messages like NAK and Decline handle errors.
What should I do if I get this 200-301 question wrong?
Review the DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
The DHCPv4 DORA process consists of four sequential messages: Discover, Offer, Request, and Acknowledge, which establish IP address leasing between client and server.
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