LTE网络中,S1-MME的接口上,协议栈由最高层往下,依次是()
A.NAS-S1AP-TCP-IP-DataLinkLayer-PhysicalLayer
B.NAS-S1AP-SCTP-PhysicalLayer
C.NAS-SCTP-TCP/IP-DataLinkLayer-PhysicalLayer
D.NAS-S1AP-SCTP-IP-DataLinkLayer-PhysicalLayer
D、NAS-S1AP-SCTP-IP-DataLinkLayer-PhysicalLayer