- Time to Live
- hold-down timers
- poison reverse
- Spanning Tree Protocol
Explanation: Spanning tree creates a single path through a switch network. This is important at Layer 2 because there is no feature such as the Layer 3 TTL to stop data from traveling infinitely through the network. This helps keep switch MAC address tables stable in broadcast storms, and when multiple frames are sent.
More Questions: CCNA 3 (v5.0.3 + v6.0) Pretest Exam Answers