Spanning Tree Protocol is used in switched networks to prevent what?

Spanning Tree Protocol is used in switched networks to prevent what?

• A. DNS resolution failures
• B. Network loops caused by redundant paths
• C. IP address exhaustion
• D. Broadcast storms in wireless networks

Answer: (B)

Spanning Tree Protocol prevents network loops in switched networks by ensuring there’s only one active path between any two devices. When switches and redundant links exist, frames can circulate endlessly if a loop forms. STP elects a root bridge, computes the shortest path to the root from every switch, and blocks enough redundant links on non-root paths so traffic can’t loop. If a link fails, STP can activate a previously blocked path to maintain connectivity, and faster variants improve how quickly this happens. It doesn’t address DNS failures, IP address exhaustion, or wireless broadcast storms directly, since those are separate issues outside STP’s purpose.

Spanning Tree Protocol prevents network loops in switched networks by ensuring there’s only one active path between any two devices. When switches and redundant links exist, frames can circulate endlessly if a loop forms. STP elects a root bridge, computes the shortest path to the root from every switch, and blocks enough redundant links on non-root paths so traffic can’t loop. If a link fails, STP can activate a previously blocked path to maintain connectivity, and faster variants improve how quickly this happens. It doesn’t address DNS failures, IP address exhaustion, or wireless broadcast storms directly, since those are separate issues outside STP’s purpose.