A.SGSN
B.HLR
C.GGSN
D.DNS

A.Active
B.Standby
C.Ready
D.Idle

A.MAP
B.TCAP
C.SCCP
D.MTP2

A.Gr
B.Gd
C.Gf
D.Gs

A.MS---BSS
B.BSS---SGSN
C.SGSN---GGSN
D.SGSN---HLR

A.MS---BSS
B.BSS---SGSN
C.SGSN---GGSN
D.SGSN---HLR

A.MS---BSS
B.BSS---SGSN
C.SGSN---GGSN
D.SGSN---HLR

A.Ipv4网络
B.IPX网络
C.Ipv6网络
D.X.25网络

A.MS
B.BSS
C.SGSN
D.GGSN

A.MS
B.SGSN
C.HLR
D.GGSN

A.TMSI
B.IMSI
C.TLLI
D.IP address