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CCNA DHCP Relay Agent Practice Question
Drag and drop the following steps into the correct order to configure a Cisco IOS-XE router as a DHCP relay agent and verify the DHCP DORA process for a client on a remote subnet.
OPTIONS: A: Configure the ip helper-address command on the interface facing the client, then verify connectivity to the DHCP server, and finally capture the DORA process using debug ip dhcp relay. [CORRECT] B: Configure the ip helper-address command on the interface facing the DHCP server, then verify connectivity to the client, and finally capture the DORA process using debug ip dhcp server packet. C: Configure the ip dhcp relay information option command on the interface facing the client, then verify connectivity to the DHCP server, and finally capture the DORA process using debug ip dhcp server packet. D: Configure the ip helper-address command on the interface facing the client, then capture the DORA process using debug ip dhcp server packet, and finally verify connectivity to the DHCP server.
⚠ Common exam trap
A common trap is placing the ip helper-address on the wrong interface or using the wrong debug command. Always place the helper address on the client-facing interface, and verify relay operation with debug ip dhcp relay, not debug ip dhcp server packet.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the ip helper-address command on the interface facing the client, then verify connectivity to the DHCP server, and finally capture the DORA process using debug ip dhcp relay.
The relay agent must be configured first by setting the ip helper-address on the client-facing interface, then verifying connectivity to the DHCP server. The DORA process should be observed using a relay-specific debug command such as debug ip dhcp relay; the originally listed debug ip dhcp server packet would show no output on a pure relay agent, making it incorrect for verification. Therefore, only option A is correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure the ip helper-address command on the interface facing the client, then verify connectivity to the DHCP server, and finally capture the DORA process using debug ip dhcp relay.
Why this is correct
The ip helper-address is correctly placed on the client-facing interface to forward DHCP broadcasts, and the debug ip dhcp relay command allows the relay agent to display DHCP packet exchanges. The order of configuration, connectivity check, then debugging is logical.
- ✗
Configure the ip helper-address command on the interface facing the DHCP server, then verify connectivity to the client, and finally capture the DORA process using debug ip dhcp server packet.
Why it's wrong here
This is incorrect because the ip helper-address must be configured on the interface facing the client, not the server, to relay client broadcasts.
- ✗
Configure the ip dhcp relay information option command on the interface facing the client, then verify connectivity to the DHCP server, and finally capture the DORA process using debug ip dhcp server packet.
Why it's wrong here
This is incorrect because the ip dhcp relay information option command is for DHCP option 82, not for basic relay; the primary command is ip helper-address.
- ✗
Configure the ip helper-address command on the interface facing the client, then capture the DORA process using debug ip dhcp server packet, and finally verify connectivity to the DHCP server.
Why it's wrong here
This is incorrect because verification of connectivity to the DHCP server should occur before capturing DORA to ensure the relay is working.
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.
✓Configure the ip helper-address command on the interface facing the client, then verify connectivity to the DHCP server, and finally capture the DORA process using debug ip dhcp relay.Correct answer▾
Why this is correct
The ip helper-address is correctly placed on the client-facing interface to forward DHCP broadcasts, and the debug ip dhcp relay command allows the relay agent to display DHCP packet exchanges. The order of configuration, connectivity check, then debugging is logical.
✗Configure the ip helper-address command on the interface facing the DHCP server, then verify connectivity to the client, and finally capture the DORA process using debug ip dhcp server packet.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error is that the helper address is placed on the client-facing interface, not the server-facing interface.
Why candidates choose this
Candidates might think the helper address should point toward the server, so they configure it on the server-facing interface.
✗Configure the ip dhcp relay information option command on the interface facing the client, then verify connectivity to the DHCP server, and finally capture the DORA process using debug ip dhcp server packet.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error is that ip helper-address is required for DHCP relay, not ip dhcp relay information option.
Why candidates choose this
Candidates may confuse DHCP relay commands with DHCP snooping or option 82 commands.
✗Configure the ip helper-address command on the interface facing the client, then capture the DORA process using debug ip dhcp server packet, and finally verify connectivity to the DHCP server.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error is that verification should precede debugging to avoid unnecessary captures if connectivity is broken.
Why candidates choose this
Candidates might think debugging can be done at any time, but proper troubleshooting order is to verify first.
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?”
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Related to this question
Learn chapter
RA Guard — IPv6 First-Hop Security
Key term
Subnet
A subnet is a logical subdivision of an IP network, created by partitioning a larger network address space using subnet masks.
Key term
DHCP relay
A network device or feature that forwards DHCP broadcast messages between clients and servers on different subnets so that IP address assignment works across multiple network segments without a separate DHCP server on each one.
About these practice questions
This 200-301 question is part of Courseiva's 1,389-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-301 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-301 exam.