In a 3G network, which of the following statements most accurately describes the user data plane between a UE and the GGSN when a direct tunnel is not used?
A.
A Radio Access Bearer between the UE and the NodeB, a GTP tunnel between the NodeB and the SGSN, and another GTP tunnel between the SGSN and the GGSN.
B.
A Radio Access Bearer between the UE and the SGSN and a GTP tunnel between the SGSN and the GGSN.
C.
A GTP tunnel between the UE and the GGSN.
D.
A Radio Access Bearer between the UE and the RNC, a GTP tunnel between the RNC and the SGSN, and another GTP tunnel between the SGSN and the GGSN.
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