RIPv2 differs from RIPv1 in that：（）
- A、it uses multicast address 224.0.0.10，instead of broadcast
- B、it uses multicast address 224.0.0.9，instead of broadcast
- C、it can use either multicast or broadcast addresses，instead of just broadcast
- D、it sends incremental updates，instead of periodic updates
- E、it is classless，instead of classful
- F、it supports authentication，and RIPv1 does not
正确答案:B,E,F
答案解析:有
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