CompTIA Network+

Answer: C - Spanning Tree Protocol is enabled on Switches.

Key takeaway: STP or Spanning Tree Protocol is enabled on Switches to prevent switching loops and anomalies called broadcast storms. By using many operations, STP attempts to prevent loops that have the potential to bring down the entire network. These loops can be caused by a number of things. An example would be if an individual should take a patch cable and plug both ends into the same switch to intentionally disrupt data traffic by forcing traffic in a loop.