CCNA: Cisco Certified Network Associate — Question 1367

Which port type supports the spanning-tree portfast command without additional configuration?

Answer options

• A. trunk ports
• B. Layer 3 sub interfaces
• C. Layer 3 main interfaces
• D. access ports

Correct answer: D

Explanation

Access ports are designed to connect end devices and support the spanning-tree portfast command natively, enabling faster transitions to the forwarding state. Trunk ports, Layer 3 sub interfaces, and Layer 3 main interfaces do not support this command without additional configuration due to their different roles in the network topology.