单项选择题 Which command will allow you to quickly determine the administrative status of all interfaces on a Junos device?（）

单项选择题 When using the monitor traffic command on Junos devices, which UNIX-based utility is accessed?（）

单项选择题 A network administrator would like to view detailed interface status, properties, statistics, errors,and CoS packet counters.Which operational command will display this information?（）