Question: What is the primary goal of replay protection in the Non-Access Stratum (NAS) protocol for Evolved Packet System (EPS)?
Option 1: To ensure confidentiality of NAS messages
Option 2: To prevent unauthorized access to EPS security context
Option 3: To guarantee Quality of Service (QoS) for NAS messages
Option 4: To assure that one and the same NAS message is not accepted twice by the receiver
Explanation: Replay protection in NAS protocol aims to prevent a receiver from accepting duplicate NAS messages, ensuring that each message is processed only once. This is crucial for maintaining the integrity of EPS security context and preventing potential attacks or errors.