多项选择题
Which three of the following network features are methods used to achieve high availability？ （）
A. Spanning Tree Protocol （STP） B. Delay reduction C. Hot Standby Routing Protocol （HSRP） D. Dynamic routing protocols E. Quality of Service （QoS） F. Jitter management
单项选择题 What can be determined about the HSRP relationship from the displayed debug output？ （）
多项选择题 Examine the router output above. Which two items are correct？ （）
多项选择题 Refer to the exhibit. Based upon the debug output that is shown， which three statements about HSRP are true？（）
