- A
Configure the 'ip helper-address' command on the interface facing the client subnet.
This is correct because the 'ip helper-address' command enables DHCP relay on the router interface, forwarding DHCP broadcasts to the DHCP server.
- B
Verify DHCP relay operation using 'show ip interface' and 'show ip dhcp relay'.
Passive show commands that confirm the relay configuration and operation after the DORA process completes.
- C
Trigger the DORA process on the client by releasing and renewing the IP address.
This is incorrect because triggering the DORA process should occur after the relay is configured and verified, not before. The order should be: configure relay, verify, then trigger DORA.
- D
Use 'debug ip dhcp relay' to observe the DORA packets being forwarded.
This is incorrect because debugging should be the last step after triggering DORA, not before. The correct order is: configure, verify, trigger, then debug.
CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 relay agent and verify the DHCP DORA process for a client on a different subnet.
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 subnet.
First configure the ip helper-address on the client-facing interface (A). Then enable 'debug ip dhcp relay' (D) so forwarded packets are captured. Next trigger the DORA process by releasing/renewing the client IP address (C). Finally verify with passive show commands (B). Debug must be active before the DORA exchange; enabling it afterward misses the output.
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 'ip helper-address' command on the interface facing the client subnet.
- ✓
Verify DHCP relay operation using 'show ip interface' and 'show ip dhcp relay'.
Why this is correct
Passive show commands that confirm the relay configuration and operation after the DORA process completes.
Related concept
CIDR notation defines the prefix length.
- ✓
Trigger the DORA process on the client by releasing and renewing the IP address.
Why this is correct
This is incorrect because triggering the DORA process should occur after the relay is configured and verified, not before. The order should be: configure relay, verify, then trigger DORA.
Related concept
CIDR notation defines the prefix length.
- ✓
Use 'debug ip dhcp relay' to observe the DORA packets being forwarded.
Why this is correct
This is incorrect because debugging should be the last step after triggering DORA, not before. The correct order is: configure, verify, trigger, then debug.
Related concept
CIDR notation defines the prefix length.
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.
- →
Network Services and Security — study guide chapter
Learn the concepts, then practise the questions
- →
Network Services and Security practice questions
Targeted practice on this topic area only
- →
All 200-301 questions
1,819 questions across all exam domains
- →
CCNA 200-301 v2 study guide
Full concept coverage aligned to exam objectives
- →
200-301 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 200-301 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network Infrastructure and Connectivity practice questions
Practise 200-301 questions linked to Network Infrastructure and Connectivity.
Switching and Network Access practice questions
Practise 200-301 questions linked to Switching and Network Access.
IP Routing practice questions
Practise 200-301 questions linked to IP Routing.
Network Services and Security practice questions
Practise 200-301 questions linked to Network Services and Security.
AI and Network Operations practice questions
Practise 200-301 questions linked to AI and Network Operations.
CCNA subnetting practice questions
Practise IPv4 subnetting, CIDR, masks, host ranges and subnet selection.
CCNA OSPF practice questions
Practise OSPF neighbours, router IDs, metrics, areas and routing-table interpretation.
CCNA VLAN practice questions
Practise VLANs, access ports, trunks, allowed VLANs and switching scenarios.
CCNA STP practice questions
Practise spanning tree, root bridge election, port roles and STP troubleshooting.
CCNA EtherChannel practice questions
Practise LACP, PAgP, port-channel behaviour and bundle requirements.
CCNA ACL practice questions
Practise standard and extended ACLs, permit/deny logic and traffic filtering.
CCNA NAT practice questions
Practise static NAT, dynamic NAT, PAT and inside/outside address translation.
Practice this exam
Start a free 200-301 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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 'ip helper-address' command on the interface facing the client subnet. — First configure the ip helper-address on the client-facing interface (A). Then enable 'debug ip dhcp relay' (D) so forwarded packets are captured. Next trigger the DORA process by releasing/renewing the client IP address (C). Finally verify with passive show commands (B). Debug must be active before the DORA exchange; enabling it afterward misses the output.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 200-301 practice questions
- A switchport connected to another switch should carry multiple VLANs, but it was manually configured as an access port.…
- What problem is HSRP designed to solve?
- Which TWO statements correctly describe the causes or implications of CRC errors, runts, giants, or output errors as see…
- You are connected to R1. Configure IPv4 and IPv6 addressing on R1's interfaces and verify reachability to R2. The curren…
- Which TWO statements accurately describe how AI/ML concepts are applied to network operations in modern enterprise netwo…
- Which TWO switch port configurations are required when connecting a Cisco IP phone and a desktop PC to a single access p…
Last reviewed: Jun 6, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.