多选题以下关于DSCP和IP Precedence的比较的说法正确的是（）。ADSCP可以兼容IP PrecedenceB因为DSCP扩展了用于流分类的比特位，所以不能简单的映射到IP Precedence里面去CDSCP包括6比特而IP Precedence包括3比特D因为仅仅可以使用RFC定义的DSCP，DSCP在使用上比IP Precedence更受限制
多选题
以下关于DSCP和IP Precedence的比较的说法正确的是（）。
A
DSCP可以兼容IP Precedence
B
因为DSCP扩展了用于流分类的比特位，所以不能简单的映射到IP Precedence里面去
C
DSCP包括6比特而IP Precedence包括3比特
D
因为仅仅可以使用RFC定义的DSCP，DSCP在使用上比IP Precedence更受限制
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