问题:
A . VPN traffic needs to be classified based on the Layer2 header information
B . VPN traffic needs to be classified based on the IP precedence or DSCP
C . VPN traffic needs to be classified based on IP flow or Layer 3 information, such as source and destination IP address
D . VPN traffic with Authentication Header (AH) needs to preserve the ToS byte
● 参考解析
本题暂无解析
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