Question: In MIPv4-based mobility protocols for Trusted Non-3G Access, which procedures are followed by the PDN-GW and FA respectively during registration?
Option 1: PDN-GW follows FA procedure, FA follows HA procedure
Option 2: PDN-GW follows HA procedure, FA follows FA procedure
Option 3: Both PDN-GW and FA follow HA procedures
Option 4: Both PDN-GW and FA follow FA procedures
Explanation: According to MIPv4 mobility management registration procedures for Trusted Non-3G Access, the PDN-GW (Packet Data Network Gateway) is required to follow the HA (Home Agent) procedure. Conversely, the FA (Foreign Agent) must adhere to the FA procedure as outlined in the relevant specifications. This distinction is crucial for maintaining the integrity and functionality of the network during registration processes.