ACSP - Aruba Certified Switching Professional Spanning Tree Protocol (STP) Questions and Answers

Question 1

An Aruba CX switch has been added to a network and must be prevented from ever becoming the root bridge. Which of the following spanning-tree commands will best achieve this goal?

Accepted Answer

spanning-tree priority 61440

Answer

spanning-tree priority 0

Answer

spanning-tree root-guard

Answer

spanning-tree mode rpvst

Question 2

A network administrator is configuring Rapid Spanning Tree Protocol (RSTP) on Aruba CX switches. Which three port states are valid in an RSTP environment?

Accepted Answer

Discarding, Learning, Forwarding

Answer

Listening, Learning, Forwarding

Answer

Blocking, Listening, Learning

Answer

Disabled, Blocking, Forwarding

Question 3

On an Aruba CX switch, which spanning-tree feature should be configured on an edge port connected to an end-user device to immediately place the port into a forwarding state and shut it down if it receives a BPDU?

Accepted Answer

BPDU Guard

Answer

Loop Protect

Answer

BPDU Filter

Answer

Admin-Edge

Question 4

A network engineer is analyzing the STP topology on a network of Aruba CX switches. A non-root switch has two redundant uplinks to two different distribution switches. One uplink port is in the Root Port role. According to RSTP (802.1w), what is the most likely role of the second uplink port that is currently blocked?

Accepted Answer

Alternate Port

Answer

Designated Port

Answer

Disabled Port

Answer

Backup Port

Question 5

Which Spanning Tree Protocol standard, supported on Aruba CX switches, allows for VLAN load balancing by creating multiple spanning tree instances and mapping VLANs to these instances?

Accepted Answer

MSTP (802.1s)

Answer

RPVST+

Answer

STP (802.1D)

Answer

RSTP (802.1w)

Question 6

Two Aruba CX switches, SW1 and SW2, are connected. Both are configured with the default STP priority. The MAC address of SW1 is 00:00:00:00:00:AA and the MAC address of SW2 is 00:00:00:00:00:BB. Which switch will be elected as the root bridge, and why?

Accepted Answer

SW1, because it has a lower MAC address.

Answer

SW2, because it has a higher MAC address.

Answer

The election will fail due to a tie in priority.

Answer

The switch that boots up first will become the root.

An Aruba CX switch has been added to a network and must be prevented from ever becoming the root bridge.Which of the following spanning-tree commands will best achieve this goal?

An Aruba CX switch has been added to a network and must be prevented from ever becoming the root bridge.
Which of the following spanning-tree commands will best achieve this goal?