- A
Configure the DHCP server on the local subnet, then configure the DHCP relay agent on the remote interface, and finally verify both server and relay functionality.
This order ensures that the DHCP server is operational on the local subnet before the relay agent is configured to forward requests from remote subnets. Verification confirms that both components work as intended.
- B
Configure the DHCP relay agent on the remote interface, then configure the DHCP server on the local subnet, and finally verify both server and relay functionality.
Why wrong: This order is incorrect because the DHCP server must be configured first to ensure it is ready to receive and process relayed requests. Configuring the relay agent first may cause it to forward requests to a non-existent server.
- C
Configure the DHCP server on the local subnet, then verify functionality, and finally configure the DHCP relay agent on the remote interface.
Why wrong: This order is incorrect because verification should occur after both server and relay are configured to test the entire DHCP process end-to-end. Verifying the server alone does not confirm relay functionality.
- D
Configure the DHCP relay agent on the remote interface, then verify functionality, and finally configure the DHCP server on the local subnet.
Why wrong: This order is incorrect because the relay agent cannot function without a DHCP server to forward requests to. Verifying the relay agent alone will fail, and configuring the server last is inefficient.
CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
Drag and drop the following steps into the correct order to configure a Cisco IOS-XE router as a DHCP server for a local subnet and enable a DHCP relay agent on a different interface to forward client requests to that server.
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 DHCP server on the local subnet, then configure the DHCP relay agent on the remote interface, and finally verify both server and relay functionality.
The DHCP server must be configured first on the local subnet, then the relay agent on the remote interface to forward requests; verification ensures both server and relay function correctly.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 DHCP server on the local subnet, then configure the DHCP relay agent on the remote interface, and finally verify both server and relay functionality.
- ✗
Configure the DHCP relay agent on the remote interface, then configure the DHCP server on the local subnet, and finally verify both server and relay functionality.
Why it's wrong here
This order is incorrect because the DHCP server must be configured first to ensure it is ready to receive and process relayed requests. Configuring the relay agent first may cause it to forward requests to a non-existent server.
- ✗
Configure the DHCP server on the local subnet, then verify functionality, and finally configure the DHCP relay agent on the remote interface.
Why it's wrong here
This order is incorrect because verification should occur after both server and relay are configured to test the entire DHCP process end-to-end. Verifying the server alone does not confirm relay functionality.
- ✗
Configure the DHCP relay agent on the remote interface, then verify functionality, and finally configure the DHCP server on the local subnet.
Why it's wrong here
This order is incorrect because the relay agent cannot function without a DHCP server to forward requests to. Verifying the relay agent alone will fail, and configuring the server last is inefficient.
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 DHCP server on the local subnet, then configure the DHCP relay agent on the remote interface, and finally verify both server and relay functionality.Correct answer▾
Why this is correct
This order ensures that the DHCP server is operational on the local subnet before the relay agent is configured to forward requests from remote subnets. Verification confirms that both components work as intended.
✗Configure the DHCP relay agent on the remote interface, then configure the DHCP server on the local subnet, and finally verify both server and relay functionality.Wrong answer — click to see why▾
Why this is wrong here
The DHCP server must be operational before the relay agent is configured; otherwise, relayed requests will be dropped.
Why candidates choose this
Candidates might think the relay agent should be configured first to prepare the path, but the server must be ready to respond.
✗Configure the DHCP server on the local subnet, then verify functionality, and finally configure the DHCP relay agent on the remote interface.Wrong answer — click to see why▾
Why this is wrong here
Verification after only server configuration does not test the relay agent, which is essential for remote clients.
Why candidates choose this
Candidates might believe in incremental verification, but the final verification should encompass both components.
✗Configure the DHCP relay agent on the remote interface, then verify functionality, and finally configure the DHCP server on the local subnet.Wrong answer — click to see why▾
Why this is wrong here
The relay agent requires a server to be present; configuring it first leads to incomplete setup and failed verification.
Why candidates choose this
Candidates might think the relay agent should be set up first to handle traffic, but the server must exist 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?”
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 200-301 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Questions learners often ask
What does this 200-301 question test?
Network Services and Security — This question tests Network Services and Security — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Configure the DHCP server on the local subnet, then configure the DHCP relay agent on the remote interface, and finally verify both server and relay functionality. — The DHCP server must be configured first on the local subnet, then the relay agent on the remote interface to forward requests; verification ensures both server and relay function correctly.
What should I do if I get this 200-301 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 200-301 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
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Last reviewed: Jun 6, 2026
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