Question: What is the primary goal of the routing identification mechanism in resolving a subscription identity's Home Environment (HE) in a serving network?
Option 1: To determine the most secure route to reach a given HE, ensuring encrypted transmission.
Option 2: To identify the lowest cost route to the end user among multiple possible alternatives.
Option 3: To establish a direct connection between the serving network and all known Home Environments.
Option 4: To prioritize routing based on the size of the networks involved.
Explanation: The correct answer reflects the telecom concept of optimizing network resource utilization while minimizing costs for the end user. Identifying the lowest cost route is crucial, especially for smaller networks, as it directly impacts billing and charging aspects.