单项选择题 Which configuration command is used to send debug level events to the console in real time?（）

单项选择题 Which configuration command allows a virtual router to receive updates from a configured NTP source?（）

单项选择题 You are trying to recover from a corrupted flash. Which configuration command configures an IP address of 192.168.1.1/24 on the SRP management interface when the ERX1400 router is at the boot## prompt?（）