Question

"spanning-tree portfast default"

What is the function of this command?
A. Enables Rapid Spanning Tree Protocol (RSTP) on all ports by default.
B. Configures all ports to transition directly to the forwarding state without waiting for the standard Spanning Tree Protocol (STP) listening and learning states.
C. Configures all ports to use the default spanning-tree priority.
D. Sets the default bridge priority to accelerate spanning-tree convergence.

Answer 1

The 'spanning-tree portfast default' command configures all ports on a switch to transition directly to the forwarding state without waiting for the standard Spanning Tree Protocol (STP) listening and learning states.

Step-by-step explanation:

The spanning-tree portfast default command is used in Cisco networking devices to configure all ports on a switch to transition directly to the forwarding state without waiting for the standard Spanning Tree Protocol (STP) listening and learning states.

By enabling this command, network administrators can ensure faster convergence and reduced network downtime. However, it should be used with caution as it can introduce loop-related issues if wrongly configured.

Therefore, the correct answer to this question is option B: Configures all ports to transition directly to the forwarding state without waiting for the standard Spanning Tree Protocol (STP) listening and learning states.