Which two services require a status check on the Cisco ASR 5000 if no Context Request Message is sent from SGSN to MME over the S3 interface?(Choose two.)
A. EGTP-service
B. SGSN-service
C. HSS-peer-service
D. SGTP-service
E. SGS-service
Which two services require a status check on the Cisco ASR 5000 if no Context Request Message is sent from SGSN to MME over the S3 interface?