[单项选择题] Old SGSN can get new SGSN’s IP address by communicating to () when a MS
2021-07-22
[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
正确答案:C
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