单项选择题
Which statemetn is true regarding the Network Time Protocol (NTP) on Junos devices?（）
A. MD5 authenticaton is supported by the Junos OS B. Server mode is not supported by the Junos OS C. The Junos OS can provide a primarytime reference D. The Junos OS does not support the use of a boot server
单项选择题 Which CLI command do you use to determine which files are cleanup candidates?（）
单项选择题 Which CLI mode allows you to make configuration changes?（）
单项选择题 Which command do you use to display the messages seen during the last system boot?（）
