Which two statements about Cisco SGSN are true? (Choose two.)

A.
Cisco SGSN can support 2G or 4G Cisco SGSN instances on a single Cisco ASR 5000
system

B.
Cisco SGSN adheres to defined 3GPP standards for mobility management, packet data,
and accounting

C.
Cisco SGSN supports paging, authentication, and P-TMSI reallocation

D.
Cisco SGSN supports single Cisco SGSN and GGSN instances on multiple Cisco ASR
5000 requests

Explanation: