判断题PHB（per-Hop Behavior）是DS结点作用于数据流的行为，每个DS结点必须支持缺省PHBA对B错
判断题
PHB（per-Hop Behavior）是DS结点作用于数据流的行为，每个DS结点必须支持缺省PHB
A
对
B
错
参考解析
解析：
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