CCNA: Cisco Certified Network Associate — Question 281

Which state does the switch port move to when PortFast is enabled?

Answer options

• A. blocking
• B. listening
• C. learning
• D. forwarding

Correct answer: D

Explanation

When PortFast is enabled on a switch port, it immediately transitions to the forwarding state, bypassing the normal Spanning Tree Protocol (STP) states of blocking, listening, and learning. The other states are for regular ports that participate in STP to prevent loops, but PortFast is designed for ports connected to end devices, allowing for immediate connectivity.