多项选择题 You have been asked to configure your router to send link-related SNMP trap notifications to the network managemetn system (NMS) located at address 172.16.17.1.Which two commands are required?（）

单项选择题 Which command is used to enable access to J-Web using HTTPS?（）

单项选择题 Which user authenticaton method is supported by the Junos OS as the last resort alternative?（）