單項(xiàng)選擇題

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

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單項(xiàng)選擇題

SGSN gets GGSN’s IP address by communicating to （） when a MS makes PDP context activation.

A.PAPU
B.HLR
C.MS
D.DNS

單項(xiàng)選擇題

After GPRS attach，SGSN will assign an identity to identify the MS，what’s it？（）

A.TMSI
B.P-TMSI
C.TLLI
D.IMSI

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