Practice Test Geeks(ACSP) Aruba Certified Switching Professional Practice Test
← All ACSP Flashcard Decks

Spanning Tree Protocol (STP) Flashcards

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

Read the first 7 Spanning Tree Protocol (STP) flashcards as text

  1. In MSTP, what term describes the spanning tree instance that interconnects all MSTP regions and any 802.1D or RSTP bridges in the network?

    Answer: CST

    The CST (Common Spanning Tree) is the single spanning tree that connects all MST regions and legacy bridges from an external perspective.

  2. What determines MSTP region membership when two switches are being compared?

    Answer: Configuration name, revision number, and VLAN-to-instance mapping table

    Switches belong to the same MSTP region only if their configuration name, revision number, and VLAN-to-instance mapping are all identical.

  3. Which STP enhancement allows a switch to immediately use an alternate uplink when the primary uplink fails, without waiting for full STP convergence?

    Answer: UplinkFast

    UplinkFast enables access-layer switches to immediately promote an alternate root port to Forwarding when the current root port fails, bypassing Listening and Learning states.

  4. A port is in RSTP Discarding state and receives a superior BPDU from the designated bridge on that segment. Which role does this port take?

    Answer: Alternate port

    A Discarding port that receives superior BPDUs from the designated bridge on its segment becomes an Alternate port, holding a backup path to the root.

  5. What is the purpose of BPDU Filter when applied globally (not per-port) on an Aruba switch?

    Answer: It suppresses BPDUs only on PortFast-enabled ports that have not yet received a BPDU

    Global BPDU Filter suppresses BPDU transmission on PortFast-enabled ports, but if a BPDU is received on such a port, PortFast is disabled and normal STP resumes.

  6. Which STP enhancement allows a switch to immediately begin using a non-root path when an indirect link failure causes the root port to lose connectivity?

    Answer: BackboneFast

    BackboneFast detects indirect failures by processing inferior BPDUs and allows the switch to expire the Max Age timer immediately, accelerating convergence after indirect failures.

  7. On an Aruba switch, which spanning-tree configuration command sets the bridge priority to make it the preferred root bridge for MST instance 1?

    Answer: spanning-tree mst 1 priority 0

    The command 'spanning-tree mst priority ' sets the bridge priority for a specific MST instance; a priority of 0 makes it the most preferred root.