Which four statements about NetFlow are true？（）
- A、NetFlow records bidirectional IP traffic flow.
- B、NetFlow export can be implemented over IPv4.
- C、NetFlow export can be implemented over IPv6.
- D、NetFlow records multicast IP traffic flow.
- E、NetFlow records ingress traffic.
- F、NetFlow records egress traffic.
正确答案:B,D,E,F
答案解析:有
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