单项选择题
A.RAR B.DWR C.DPR D.CER
A.Session-id B.bearer-identifier C.APN D.Rule信息
A.DPR/DPA B.ASR/ASA C.RAR/RAA D.CCR/CCA
A.DPR/DPA B.ASR/ASA C.CER/CEA D.DWR/DWA
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