问题
单项选择题
SGSN gets GGSN’s IP address by communicating to （） when a MS makes PDP context activation.
A.PAPU
B.HLR
C.MS
D.DNS
答案
参考答案：D
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SGSN gets GGSN’s IP address by communicating to （） when a MS makes PDP context activation.
A.PAPU
B.HLR
C.MS
D.DNS
参考答案：D