Which of the following statements is true regarding the SGSN environment?
A.
The data plane in the 3G environment is implemented by the RANAP protocol.
B.
In the 2G environment, control information is exchanged using SS7 between the RNCs
and the SGSN.
C.
The SGSN needs the ability to query the HLR to receive subscriber service profilesand to
authenticate connection requests.
D.
In the 3G environment, the SGSN acts as the controller of the BSCs that areconnected to
it.