Question: In a trusted non-3GPP access roaming scenario for N5CW devices, what is the primary purpose of including <5G_device_unique_identity> in the Decorated Network Access Identifier (NAI) format?
Option 1: To identify the visited network's MCC (Mobile Country Code)
Option 2: To authenticate the user's subscription profile
Option 3: To specify the preferred network slice for the device
Option 4: To uniquely identify the N5CW device in the roaming scenario
Explanation: The inclusion of <5G_device_unique_identity> in the Decorated NAI format is specifically to provide a unique identifier for the N5CW device, ensuring it can be distinctly recognized and managed within the trusted non-3GPP access roaming context. This uniqueness is crucial for efficient network operation, security, and service delivery tailored to the device's capabilities and the user's subscription.