Question: In a serving network, what is the primary purpose of collecting and processing charging information from network elements in real-time for visitors from another home environment?
Option 1: To optimize network resource allocation based on usage patterns.
Option 2: To enable the serving network to monitor and control exposure to potential fraudulent activities or excessive charges from visitors.
Option 3: To provide detailed, up-to-the-minute billing information directly to the visitors' home environments for immediate payment processing.
Option 4: To facilitate automatic roaming agreement negotiations between the serving and home networks based on accumulated visitor charges.
Explanation: Collecting and processing charging information in real-time allows the serving network to be aware of its exposure to potential fraudulent activities or excessive charges from visitors, enabling proactive measures to protect against financial losses.