Which two statements best describe Cisco IOS IP SLA？（）
- A、only implemented between Cisco source and destination-capable devices
- B、statistics provided by syslog， CLI， and SNMP
- C、measures delay， jitter， packet loss， and voice quality
- D、only monitors VoIP traffic flows
- E、provides active monitoring
- F、provides passive monitoring
正确答案:C,E
答案解析:有
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