Benefits of Using the PortFast Feature
Question
What are two benefits of using the PortFast feature? (Choose two.)
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D. E.CD.
The PortFast feature is a Cisco network switch feature that allows for rapid spanning tree protocol (STP) convergence on access layer ports. It is typically used to improve the time it takes for end devices to connect to the network after a reboot or shutdown.
The benefits of using the PortFast feature include:
Enabled interfaces come up and move to the forwarding state immediately: With PortFast enabled, the switch will not wait for the port to go through the normal STP listening and learning phases, which can take up to 50 seconds. Instead, the port is immediately placed into the forwarding state, allowing end devices to connect and communicate with the network more quickly.
Enabled interfaces never generate topology change notifications: When a switch port goes through the STP listening and learning phases, it generates a topology change notification (TCN) that is sent to other switches in the network. These notifications can cause unnecessary network traffic and slow down convergence time. With PortFast enabled, TCNs are never generated on the port, which helps to reduce network traffic and improve network performance.
Therefore, the correct answers to the question are:
D. Enabled interfaces come up and move to the forwarding state immediately. C. Enabled interfaces never generate topology change notifications.
