Question: What is the primary purpose of defining a minimum set of IPsec features in the Network Domain Security (NDS) specification for IP network layer security?
Option 1: To enhance security for all possible network constellations and usages beyond NDS/IP
Option 2: To allow operators to implement additional IPsec features within their networks without restrictions
Option 3: To achieve reduced complexity through simplifications while maintaining the required security level, specifically for interworking purposes within NDS/IP
Option 4: To mandate the use of all available IPsec features across all 3GPP interfaces and network nodes
Explanation: The correct answer is Option 3 because defining a minimum set of IPsec features aims to reduce complexity without sacrificing security, specifically for interworking purposes within NDS/IP. This aligns with streamlining operations while maintaining security for the specified use case.