单项选择题
During a password recovery, what is the next step after configuring the system to boot into single-user mode?（）
A. Reset the root password B. Press the space bar C. Type recovery D. Press the "Enter" key
多项选择题 What are three benefits of class of service?（）
单项选择题 Which command will display the contents of the forwarding table?（）
单项选择题 Which operational mode command can be used to synchronize the local system with an NTP server?（）
