CCNA: Cisco Certified Network Associate — Question 1228

Which switch technology establishes a network connection immediately when it is plugged in?

Answer options

• A. PortFast
• B. BPDU guard
• C. UplinkFast
• D. BackboneFast

Correct answer: A

Explanation

PortFast allows a switch port to enter the forwarding state immediately when a device is connected, bypassing the usual Spanning Tree Protocol (STP) listening and learning states. BPDU guard, UplinkFast, and BackboneFast serve different purposes in managing network topology and stability but do not provide immediate connectivity upon plugging in a device.