Question: What is the primary purpose of the protection policy suite in the context of 5G System security?
Option 1: To determine which part of a message shall be modifiable by IPX providers and to specify the encryption algorithms used.
Option 2: To apply application layer protection of messages on the N32-f interface and to map data-types to NF API descriptions.
Option 3: To determine which part of a certain message shall be confidentiality protected and which part of a certain message shall be modifiable by IPX providers.
Option 4: To specify the authentication protocols used for secure communication between network functions.
Explanation: The protection policy suite is comprised of two policies, namely data-type encryption policy and modification policy. Together, these policies determine which part of a message shall be confidentiality protected and which part of a certain message shall be modifiable by IPX providers. This ensures that sensitive information is protected from unauthorized access and modifications are only made by authorized entities.