多项选择题
A. set snmp trap-group my-trap-group targets 172.16.17.1
B. set snmp targets 172.16.17.1
C. set snmp trap-group my-trap-group link-status
D. set snmp trap-group my-trap-group categories link
单项选择题 When considering the default behavior of Junos platforms, which statement is true about archiving configurations?（）
单项选择题 When configuring more than one archival site, which statement is true?（）
单项选择题 Which operational mode command can be used to synchronize the local system time with an NTP server?（）