🌳 Spanning Tree Protocol - CCNA Practice Questions

Understand STP, RSTP, and PVST+ operation: root bridge election, port roles (root, designated, blocking), port states, and how STP prevents Layer 2 loops.

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1Exam Domains

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CCNA STP Question Bank (5 Questions)

Browse all 5 practice questions covering Spanning Tree Protocol for the CCNA certification exam. Answers are intentionally hidden on this page so you can self-test first before checking results in quiz mode.

  1. Question 1Network Access

    How is the STP root bridge elected?

    AThe switch with the highest MAC address
    BThe switch with the lowest Bridge ID (priority + MAC address) — default priority is 32768, lower values are preferred
    CThe first switch powered on
    DRandom selection

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  2. Question 2Network Access

    What are the port states in Rapid Spanning Tree Protocol (RSTP)?

    ABlocking, Listening, Learning, Forwarding, Disabled
    BDiscarding, Learning, and Forwarding — RSTP consolidates STP's Blocking, Listening, and Disabled into Discarding
    CActive and Inactive
    DUp and Down

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  3. Question 3Network Access

    In the Rapid Spanning Tree Protocol (RSTP, 802.1w), which port role replaces the blocking state from classic STP?

    AAlternate port
    BBackup port
    CDesignated port
    DRoot port

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  4. Question 4Network Access

    In RSTP (802.1w), which port role replaces the non-designated port role from classic STP?

    ABackup port
    BAlternate port
    CEdge port
    DDisabled port

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  5. Question 5Network Access

    What is the default STP bridge priority value on Cisco switches?

    A0
    B4096
    C32768
    D65535

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Key STP Concepts for CCNA

stprstppvstroot bridgeroot portdesignated portblockingforwardingbridge prioritybpdu

CCNA STP Exam Tips

Spanning Tree Protocol questions in CCNA are typically scenario-based. Focus on network fundamentals, IP connectivity, security basics, and automation concepts. Priority concepts: stp, rstp, pvst, root bridge, root port, designated port.

What CCNA Expects

  • Anchor your answer in choose the configuration that correctly applies to the described network topology and requirements.
  • STP scenarios for CCNA are frequently mapped to Domain 2 (20%), so read the objective carefully before picking controls or architecture.
  • Expect multi-topic scenarios where STP interacts with routing, switching, security, or automation patterns rather than appearing as an isolated question.
  • When two options are both technically valid, prefer the choice that best aligns with the exam's operational scope (Associate) and vendor best practices.

High-Value STP Concepts

  • Know the core STP building blocks cold: stp, rstp, pvst, root bridge.
  • Review the edge-case features and limits for root port, designated port; these details are commonly used to differentiate answer choices.
  • Practice service-integration reasoning: how STP pairs with Switching, EtherChannel, Network Fundamentals in real deployment patterns.
  • For CCNA, explain why the chosen STP design meets reliability, security, and cost expectations better than the alternatives.

Common CCNA Traps

  • Watch for confusing similar protocols or mixing Layer 2 and Layer 3 behavior.
  • Questions in Network Access often include distractors that look correct for STP but violate security policy, convergence, or redundancy requirements.
  • Avoid picking options purely by feature name; validate data path, failure handling, and governance impact before answering.
  • If the prompt hints at automation or repeatability, eliminate manual-only operational answers first.

Fast Review Checklist

  • Can you compare at least two STP implementation paths and justify which one best fits the scenario?
  • Can you map the chosen answer back to Network Access (20%) outcomes for CCNA?
  • Can you explain security and access boundaries for STP without relying on default-open assumptions?
  • Can you describe how STP integrates with Switching and EtherChannel during failure, scaling, and monitoring events?

Exam Domains Covering STP

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