Question: What is a Data Network Access Identifier (DNAI) in the context of 5G networks?
Option 1: A standardized identifier for user plane access to one or more Data Networks (DNs)
Option 2: An operator-defined identifier for user plane access to one or more DNs where applications are deployed
Option 3: A unique identifier for a specific application deployed on a DN
Option 4: A standardized format for representing network architecture
Explanation: A DNAI is an operator-defined identifier that provides access to one or more Data Networks (DNs) where applications are deployed. This allows operators to manage and identify user plane access to their networks in a flexible manner, as the format of the DNAI is defined by the operator and not standardized.