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