| a. Authentication, Authorization, Ciphering |
| b. GTP tunneling to GGSN, Charging (Billing), Session management |
| c. Mobility manage, interaction with HLR, MSC/VLR, NMS interface |
| d. All of the above |
| Answer: All of the above |
| a. Authentication, Authorization, Ciphering |
| b. GTP tunneling to GGSN, Charging (Billing), Session management |
| c. Mobility manage, interaction with HLR, MSC/VLR, NMS interface |
| d. All of the above |
| Answer: All of the above |