CCNA: Cisco Certified Network Associate — Question 565

Which two spanning-tree states are bypassed on an interface running PortFast? (Choose two.)

Answer options

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

Correct answer: B, C

Explanation

PortFast allows a port to transition directly to the forwarding state, bypassing both the listening and learning states. This is beneficial for devices like end hosts that do not cause network loops, while the other states (disabled, blocking, and forwarding) are not skipped in this process.