Question: What is a key characteristic of the format of a Data Network Access Identifier (DNAI) in the context of 5G System (5GS) architecture?
Option 1: It is a universally standardized numerical value.
Option 2: It follows a predefined, fixed string pattern across all operators.
Option 3: Its format is defined by the operator and is not standardized.
Option 4: It can only be represented as an IP address.
Explanation: In the context of telecom networks, particularly within the 5G System architecture, the flexibility in configuring identifiers like DNAI is crucial for operators to manage and differentiate their services efficiently. By not standardizing the format of a Data Network Access Identifier (DNAI), operators gain the freedom to tailor it according to their specific infrastructure, service offerings, or customer base, which is essential for operational agility and customization.