Question: What is the primary purpose of replay protection in the context of 5G System (5GS) Non-Access Stratum (NAS) protocol?
Option 1: To ensure message confidentiality between the UE and AMF.
Option 2: To prevent unauthorized access to NAS messages.
Option 3: To assure that a given NAS COUNT value is accepted at most one time for a given 5G NAS security context.
Option 4: To verify the integrity of NAS messages.
Explanation: Replay protection in 5GS NAS protocol ensures that a given NAS message is not accepted twice by the receiver, specifically by verifying that a given NAS COUNT value is accepted at most one time for a given 5G NAS security context. This prevents replay attacks and maintains the integrity of NAS messages.