Question: In a scenario where multiple Control Plane (CP) functions control a single User Plane (UP) function, what is crucial to avoid conflicts of Packet Flow Descriptions (PFDs) for the same Application Identifier?
Option 1: Implementing load balancing between CP functions
Option 2: Enforcing a well-planned Policy and Charging Rules Function (PCRF) deployment
Option 3: Utilizing a single Policy and Charging Enforcement Function (PCEF) per UP function
Option 4: Configuring redundant PFDs on the UP function for fault tolerance
Explanation: To avoid conflicts of PFDs corresponding to the same Application Identifier provided by different CP functions in a setup where multiple CP functions control one UP function, it is essential to have a well-planned deployment strategy. This involves carefully configuring and managing the Policy and Charging Rules Function (PCRF) and the overall network architecture to prevent such conflicts, ensuring seamless operation and accurate policy enforcement across the network.