A. show system boot-messagesB. show chassis messagesC. ……

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

多项选择题Which two statements are true about the primary address on an interface? （）

A. It is the address used by default as the local address for broadcast and multicast packets sourced locally and sent out of the interface
B. You use the primary address when you have multiple IP addresses belonging to the same subnet on the same inteface
C. It can be useful for selecting the local address used for packets sent out of unnumbered interfaces when multiple non-127 addresses are configured on the loopback interface
D. By default, the primary address on an interface is selected as the nmerically highest local address configured on the interface