STP Configuration and Management 3

Question 1

Which STP feature automatically sets an access port to forwarding state immediately without going through listening and learning?

Accepted Answer

PortFast

Answer

PortFast bypasses the listening and learning states and immediately transitions an access port to forwarding, reducing convergence time for end devices.

Question 2

What command enables PortFast on all non-trunking access ports globally on a Cisco switch?

Accepted Answer

spanning-tree portfast default

Answer

The global command 'spanning-tree portfast default' enables PortFast on all non-trunking interfaces without configuring each one individually.

Question 3

Root Guard is best applied to which type of port?

Accepted Answer

Designated ports where unauthorized root bridges might appear

Answer

Root Guard is applied to designated ports to prevent a connected switch from becoming the root bridge by placing the port in root-inconsistent state if a superior BPDU is received.

Question 4

What does the 'spanning-tree loopguard default' command do?

Accepted Answer

Enables Loop Guard globally on all point-to-point ports

Answer

The 'spanning-tree loopguard default' command globally enables Loop Guard on all point-to-point ports, protecting against unidirectional link failures.

Question 5

Which STP timer controls how long a port remains in the listening and learning states?

Accepted Answer

Forward delay

Answer

Forward delay (default 15 seconds) is the time a port spends in each of the listening and learning states before transitioning to forwarding.

(STP) Spanning Tree Protocol Practice Test

(STP) Spanning Tree Protocol Practice Test

STP Configuration and Management 3