单项选择题
A.SMPP33协议 B.SMPP34协议 C.Diameter协议 D.SMPP3.4扩展协议
A.mms.e164.cnct B.ismp.e164.cnct C.wapgw.e164.cnct D.smgw.e164.cnct
A.100K B.120K C.30K