SA用户的PLMNID信息在哪条信令里面？（）

A.PDU Session Setup Establishment Request

B.PDU Session Establishment Accept

C.Registration Accept

D.Registration Request

A.SNStatusTransfer

B.RRCConnectionReconfiguration

C.SgNBADDREQ

D.SgNBMODREQ

A.N2用于承载核心网到基站之间的控制面信令

B.N3用于承载核心网到基站之间的用户面信令

C.N4用于承载核心网UPF到SMF之间的会话管理信息

D.N9接口,媒体面接口,UPF-UPF核心网下沉用户面UPF之间的接口

A.直传给CN的第一条信令（初始直传）

B.鉴权，加密后的第一条直传信令

C.Rab建立请求

D.RB建立请求

A.UECONTEXTRELEASEREQUEST

B.PDUSESSIONRESOURSERELEASECOMMAND

C.PDUSESSIONRESOURSESETUPREQUEST

D.PDUSESSIONRESOURSEMODIFYREQUEST

A.UE CONTEXT RELEASE REQUEST

B.PDU SESSION RESOURSE RELEASE COMMAND

C.PDU SESSION RESOURSE SETUP REQUEST

D.PDU SESSION RESOURSE MODIFY REQUEST

A．RRC Reconfiguration

B．PDU Session resource mod

C．PDU Session resource mod

D．UE Context release request

A.SRNS Context Request

B.Location Update Request

C.Update PDP Context Request

D.SGSN Context Request

A.SBC

B.MME

C.AMF

D.eNB