Question 649 of 1,819

Switching and Network Access →hardDrag & DropObjective-mapped

CCNA Switching and Network Access Practice Question

This 200-301 practice question tests your understanding of switching and network access. 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 Root Guard on designated ports, Loop Guard on non-designated ports, and BPDU Guard on PortFast ports, including recovery steps when a port enters err-disabled.

Question 1harddrag order

Read the full NAT/PAT explanation →

A
1. Configure Root Guard on designated ports. 2. Configure Loop Guard on non-designated ports. 3. Configure BPDU Guard on PortFast ports. 4. Configure errdisable recovery for the cause (e.g., bpduguard).
This order follows the recommended sequence: Root Guard on designated ports first to protect the root bridge, then Loop Guard on non-designated ports to prevent alternate/backup ports from causing loops, then BPDU Guard on PortFast ports to protect against unexpected BPDUs, and finally recovery steps to automatically re-enable ports that enter err-disabled state.
B
1. Configure BPDU Guard on PortFast ports. 2. Configure Loop Guard on non-designated ports. 3. Configure Root Guard on designated ports. 4. Configure errdisable recovery for the cause.
This order is incorrect because BPDU Guard should be applied after Root Guard and Loop Guard, as it is a protection for edge ports and not directly related to STP topology changes. Root Guard must be applied first to prevent unwanted root bridge changes.
C
1. Configure Loop Guard on non-designated ports. 2. Configure Root Guard on designated ports. 3. Configure BPDU Guard on PortFast ports. 4. Configure errdisable recovery for the cause.
This order is incorrect because Loop Guard should be applied after Root Guard. Root Guard must be configured first on designated ports to prevent unauthorized root bridge advertisements, then Loop Guard on non-designated ports to prevent loops.
D
1. Configure errdisable recovery for the cause. 2. Configure Root Guard on designated ports. 3. Configure Loop Guard on non-designated ports. 4. Configure BPDU Guard on PortFast ports.
This order is incorrect because errdisable recovery should be configured last, after all STP protection mechanisms are in place. Configuring recovery first is illogical as it applies only after a violation occurs.

Full breakdown with real-world context →

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

✓

1. Configure Root Guard on designated ports. 2. Configure Loop Guard on non-designated ports. 3. Configure BPDU Guard on PortFast ports. 4. Configure errdisable recovery for the cause (e.g., bpduguard).

Root Guard must be applied first on designated ports to prevent unwanted root bridge changes, then Loop Guard on non-designated ports to prevent loops, followed by BPDU Guard on PortFast ports. Recovery steps are last because they apply after a violation occurs.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
1. Configure Root Guard on designated ports. 2. Configure Loop Guard on non-designated ports. 3. Configure BPDU Guard on PortFast ports. 4. Configure errdisable recovery for the cause (e.g., bpduguard).
Why this is correct
This order follows the recommended sequence: Root Guard on designated ports first to protect the root bridge, then Loop Guard on non-designated ports to prevent alternate/backup ports from causing loops, then BPDU Guard on PortFast ports to protect against unexpected BPDUs, and finally recovery steps to automatically re-enable ports that enter err-disabled state.
Related concept
Static NAT maps one inside address to one outside address.
✓
1. Configure BPDU Guard on PortFast ports. 2. Configure Loop Guard on non-designated ports. 3. Configure Root Guard on designated ports. 4. Configure errdisable recovery for the cause.
Why this is correct
This order is incorrect because BPDU Guard should be applied after Root Guard and Loop Guard, as it is a protection for edge ports and not directly related to STP topology changes. Root Guard must be applied first to prevent unwanted root bridge changes.
Related concept
Static NAT maps one inside address to one outside address.
✓
1. Configure Loop Guard on non-designated ports. 2. Configure Root Guard on designated ports. 3. Configure BPDU Guard on PortFast ports. 4. Configure errdisable recovery for the cause.
Why this is correct
This order is incorrect because Loop Guard should be applied after Root Guard. Root Guard must be configured first on designated ports to prevent unauthorized root bridge advertisements, then Loop Guard on non-designated ports to prevent loops.
Related concept
Static NAT maps one inside address to one outside address.
✓
1. Configure errdisable recovery for the cause. 2. Configure Root Guard on designated ports. 3. Configure Loop Guard on non-designated ports. 4. Configure BPDU Guard on PortFast ports.
Why this is correct
This order is incorrect because errdisable recovery should be configured last, after all STP protection mechanisms are in place. Configuring recovery first is illogical as it applies only after a violation occurs.
Related concept
Static NAT maps one inside address to one outside address.

Common exam traps

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Detailed technical explanation

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

Identify inside and outside interfaces first.
Check whether the scenario needs static NAT, dynamic NAT or PAT.
Do not confuse NAT matching ACLs with normal packet-filtering intent.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Real-world example

How this comes up in practice

A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.

What to study next

Got this wrong? Here's your next step.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 200-301 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this 200-301 question test?

Switching and Network Access — This question tests Switching and Network Access — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: 1. Configure Root Guard on designated ports. 2. Configure Loop Guard on non-designated ports. 3. Configure BPDU Guard on PortFast ports. 4. Configure errdisable recovery for the cause (e.g., bpduguard). — Root Guard must be applied first on designated ports to prevent unwanted root bridge changes, then Loop Guard on non-designated ports to prevent loops, followed by BPDU Guard on PortFast ports. Recovery steps are last because they apply after a violation occurs.

What should I do if I get this 200-301 question wrong?

What is the key concept behind this question?

Static NAT maps one inside address to one outside address.

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Last reviewed: Jun 6, 2026

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