ICND2: Interconnecting Cisco Networking Devices Part 2 (legacy) — Question 71

Which spanning-tree feature places a port immediately into a forwarding state?

Answer options

• A. BPDU guard
• B. PortFast
• C. loop guard
• D. UDLD
• E. UplinkFast

Correct answer: B

Explanation

PortFast is designed to allow a port to enter the forwarding state immediately, bypassing the usual listening and learning states. BPDU guard, loop guard, UDLD, and UplinkFast serve different purposes related to preventing loops and ensuring stability in the network but do not place a port directly into forwarding mode.