Practice Test Geeks(STP) Spanning Tree Protocol Practice Test
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Advanced Features and Variants Flashcards

7 cards from real STP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Advanced Features and Variants flashcards as text

  1. Which STP protection feature should be enabled on all access ports connected to end devices to prevent them from participating in STP topology changes?

    Answer: BPDU Guard

    BPDU Guard disables a PortFast-enabled port if any BPDU is received, protecting the STP topology from rogue switches.

  2. What does the STP Backbone Fast feature do when an indirect link failure is detected?

    Answer: Allows a switch to use an alternate port without waiting for MaxAge by sending RLQ messages

    Backbone Fast uses Root Link Query (RLQ) messages to verify if the root is still reachable via upstream switches, cutting MaxAge wait time.

  3. STP UplinkFast is most beneficial in which network scenario?

    Answer: Access layer switches with one uplink active and one in blocking state

    UplinkFast allows an access-layer switch to immediately activate a blocking uplink port upon loss of the active uplink, bypassing listening/learning states.

  4. In MSTP, what is IST (Internal Spanning Tree)?

    Answer: Instance 0 inside an MST region that carries unassigned VLANs and connects to the CIST

    The IST is MST instance 0 within a region; it carries all VLANs not explicitly mapped to other instances and connects the region to the CIST.

  5. Which RSTP port role forwards traffic and is elected based on lowest path cost to the root bridge?

    Answer: Root Port

    The Root Port is the port on a non-root switch with the lowest cumulative path cost to the root bridge, and it forwards traffic toward the root.

  6. What distinguishes an RSTP Alternate Port from a Backup Port?

    Answer: Alternate provides a redundant path to the root via a different switch; Backup provides redundancy on the same switch/segment

    An Alternate Port offers an alternate path to the root through a different bridge, while a Backup Port is a redundant port on the same shared segment.

  7. When configuring MSTP on Cisco switches, which command sets the MST region name?

    Answer: spanning-tree mst configuration name

    Under the MST configuration submode, the command 'spanning-tree mst configuration' followed by 'name ' sets the region name.