Question: What is the primary function of the internal GPRS DNS functionality in relation to an Access Point Name (APN) in a GPRS backbone?
Option 1: To authenticate User Equipment (UE) before assigning an IP address
Option 2: To translate the APN into the IP address of the Gateway GPRS Support Node (GGSN)
Option 3: To prioritize data traffic for Quality of Service (QoS) management
Option 4: To encrypt data transmissions between the UE and the GGSN
Explanation: The internal GPRS DNS functionality plays a crucial role in supporting inter-PLMN roaming by translating the APN into the IP address of the GGSN, facilitating seamless communication across different networks during roaming scenarios.