Question: In an IP flow mobility scenario, what determines the order in which the PCRF evaluates multiple IP flow mobility routing rules to select a BBF (BBERF or PCEF) for a service data flow?
Option 1: The rule identifier assigned by the PCEF
Option 2: The type of access network (3GPP or non-3GPP)
Option 3: The precedence derived from the priority assigned to the routing filters
Option 4: The IP address specified in the routing address
Explanation: The correct answer is Option 3 because, according to the specifications, the precedence defines the order in which the PCRF evaluates IP flow mobility routing rules. This precedence is derived from the priority assigned to the routing filters included in the Binding Update for rules not containing a default packet filter, ensuring that the PCRF selects the appropriate BBF based on prioritized routing criteria for service data flows.