A. enable modeB. configuration modeC. operational modeD……

单项选择题Which command do you use to display the messages seen during the last system boot?（）

A. show system boot-messages
B. show chassis messages
C. show file system boot-messages
D. show boot-log messages

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?（）

A. It can make a slow network faster
B. It can prioritize latency-sensitive traffic
C. It can elimitane congestion
D. It can control congestion
E. It can allocate bandwidth for different classes of traffic

单项选择题Which command will display the contents of the forwarding table?（）

A. show route forwarding-table
B. show forwarding
C. show configuration

单项选择题Which operational mode command can be used to synchronize the local system with an NTP server?（）

A. set ntp time 64.32.129.3
B. set clock ntp 64.32.129.3
C. set time 64.32.129.3
D. set date ntp 64.32.129.3