单项选择题
A.ASB.BGCF和MGCFC.HSS和SLFD.MRFC和MRFP
A.CSCFB.BGCF和MGCFC.HSS和SLFD.ENUM/DNS
A.CSCFB.BGCF和MGCFC.HSS和SLFD.MRFC和MRFP
A.SIPB.DiameterC.No.7、SigtranD.H .248
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