A network engineer is designing a redundant network using RSTP. For faster convergence, what is the recommended method to avoid waiting for the forward delay timer?
Edge ports transition immediately to forwarding.
Why this answer
RSTP (Rapid Spanning Tree Protocol, IEEE 802.1w) achieves faster convergence by eliminating the listening and learning states for edge ports. Configuring interfaces connected to end hosts as edge ports allows them to transition directly to the forwarding state without waiting for the forward delay timer (default 15 seconds), because no BPDUs are expected on those ports and no loop can form.
Exam trap
The trap here is that candidates often confuse the forward delay timer with the hello timer or think that manually setting the root bridge speeds up convergence, but RSTP's edge port configuration is the only method that directly avoids the forward delay wait.
How to eliminate wrong answers
Option B is wrong because manually specifying the root bridge and root port influences the topology but does not bypass the forward delay timer; RSTP still requires the timer for non-edge ports to ensure loop-free convergence. Option C is wrong because link aggregation (LAG) bundles multiple links into a single logical link, which is treated as one port by spanning tree, but it does not eliminate the forward delay timer for that logical port. Option D is wrong because increasing the hello timer (default 2 seconds) would slow down BPDU exchange, not speed it up, and the hello timer does not control the forward delay timer; the forward delay timer is independent and used for state transitions.