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
答案解析:有
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Old SGSN can get new SGSN’s IP address by communicating to （） when a MS requests inter_SGSN RA update.
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