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[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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