Question: What is the primary purpose of the Abort-Session-Answer (ASA) command in the context of interworking between PLMN and PDN?
Option 1: To establish a new IP-CAN bearer.
Option 2: To confirm the successful termination of an IP-CAN bearer as requested.
Option 3: To modify existing AVPs for Gi/Sgi purposes.
Option 4: To ignore other valid AVPs not used for Gi/Sgi purposes.
Explanation: The ASA command is sent in response to the Abort-Session-Request (ASR) and its primary purpose is to confirm that the IP-CAN bearer has been successfully terminated as requested, which is indicated by the Experimental-Result AVP containing an Experimental-Result-Code AVP.