问题
单项选择题
Old SGSN can get new SGSN’s IP address by communicating to () when a MS requests inter_SGSN RA update.
A.MS
B.GGSN
C.DNS
D.HLR
答案
参考答案:C
Old SGSN can get new SGSN’s IP address by communicating to () when a MS requests inter_SGSN RA update.
A.MS
B.GGSN
C.DNS
D.HLR
参考答案:C