Question: What is an appropriate use case for the Private Message Mechanism in the UTRAN Iur interface RNSAP signalling?
Option 1: Implementing standardized multivendor interoperable features required for basic network functionality.
Option 2: Deploying a new, untested encryption algorithm across all User Equipment (UE) devices on the network.
Option 3: Standardizing existing vendor-specific features to ensure cross-vendor compatibility.
Option 4: Evaluating new, non-standardized algorithms or features by vendors before potential standardization.
Explanation: The Private Message Mechanism is intended for non-standard uses, such as allowing vendors to test and evaluate new features or algorithms that are not yet part of the standardized basic functionality. This mechanism supports innovation while maintaining the integrity of standardized, interoperable core functions.