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多项选择题Which three of these statements about the IP service level agreement （SLA） sender are true？ （）

A、SLA sender target can be an IP host

B、SLA sender sends a probe packet and a response probe packet

C、SLA sender sends a probe packet

D、SLA sender target must be a router

E、SLA sender target can be an IP SLA responder

  • A,C,E

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