A.MM1 B.MM2 C.MM3 D.MM4
A.WAPGW、MMSRelay、SMSC、無線網(wǎng)絡(luò)、手機(jī) B.MMS、SMSC、無線網(wǎng)絡(luò)、手機(jī) C.WAPGW、SMSC、MMSRelay、無線網(wǎng)絡(luò)、手機(jī) D.SMSC、MMS、無線網(wǎng)絡(luò)、手機(jī)
A.File Transfer Protocol B.Hyper Text Transport Protocol C.Simple Message Transfer Protocol D.Simple Network Management Protoco