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CCNA Switching and Network Access Practice Question
This 200-301 practice question tests your understanding of switching and network access. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which three of the following are true regarding the operation of Rapid Spanning Tree Protocol (RSTP) compared to classic STP (802.1D)? (Choose three.)
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
✓
RSTP uses proposal/agreement to achieve faster convergence.
RSTP (802.1w) uses a proposal/agreement handshake process to rapidly transition ports to the forwarding state without relying on timers, achieving convergence in under a second in most switched networks. This is a fundamental improvement over classic STP (802.1D), which depends on slow timer-based convergence. Additionally, RSTP reduces the classic five port states (blocking, listening, learning, forwarding, disabled) to three (discarding, learning, forwarding) and introduces new port roles—alternate and backup—to provide faster failover by maintaining a ready alternative path to the root.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that RSTP eliminates the blocking state entirely, when in fact it renames it to discarding and still uses it for alternate and backup ports.
Detailed technical explanation
How to think about this question
RSTP reduces port states from five (blocking, listening, learning, forwarding, disabled) to three (discarding, learning, forwarding) by merging blocking, listening, and disabled into the discarding state. The proposal/agreement mechanism works by having a designated port send a proposal message, and the receiving bridge immediately agrees by setting its port to discarding and forwarding the proposal upstream, allowing rapid convergence without waiting for timers. In real-world scenarios, this is critical for networks with time-sensitive traffic like VoIP or industrial automation, where sub-second failover is required.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: RSTP uses proposal/agreement to achieve faster convergence. — RSTP (802.1w) uses a proposal/agreement handshake process to rapidly transition ports to the forwarding state without relying on timers, achieving convergence in under a second in most switched networks. This is a fundamental improvement over classic STP (802.1D), which depends on slow timer-based convergence. Additionally, RSTP reduces the classic five port states (blocking, listening, learning, forwarding, disabled) to three (discarding, learning, forwarding) and introduces new port roles—alternate and backup—to provide faster failover by maintaining a ready alternative path to the root.
What should I do if I get this 200-301 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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