单项选择题 You are implementing basic switch security best practices.  Which of these is a tactic that you can use to mitigate compromises from being launched through the switch？（）

单项选择题 Three Cisco Catalyst switches have been configured with a first-hop redundancy protocol. While reviewing some show commands， debug output， and the syslog， you discover the following information： What conclusion can you infer from this information？（）

单项选择题 You work as a network engineer for . You study the exhibit carefully. Three switches are configured for HSRP. Switch1 remains in the HSRP listen state.  What is the most likely cause of this status？（）