Question
A company is experiencing multiple switch failures. The network analyst discovers the following:
- Network recovery time is unacceptable and occurs after the shutdown of some switches.
- Some loops were detected in the network.
- No broadcast storm was detected.
Which of the following is the most cost-effective solution?
- A. Add a new Layer 3 switch.
- B. Add multiple VLANs.
- C. Implement STP. Correct
- D. Implement tagging.
Explanation
Spanning Tree Protocol (in practice its rapid variant) blocks redundant paths to remove layer 2 loops and automatically reopens a blocked path when a switch or link fails, restoring connectivity without manual action. It is a feature of the existing switches, so it costs nothing extra. A new Layer 3 switch costs money and does not remove loops by itself, and VLANs or tagging segment traffic but do not prevent loops or speed up recovery.
