Question: What should the UE include in the ESM INFORMATION RESPONSE message when responding to an ESM INFORMATION REQUEST message from the network?
Option 1: All protocol configuration options that need to be transferred security protected, APN if required, and the EPS bearer identity of the default bearer.
Option 2: Only the PTI from the ESM INFORMATION REQUEST message.
Option 3: The UE's current location and the list of supported radio access technologies.
Option 4: The EPS bearer identity of the dedicated bearer and the QoS parameters.
Explanation: According to the 3GPP specification, when responding to an ESM INFORMATION REQUEST message, the UE should include all protocol configuration options that need to be transferred security protected, APN if required, in the ESM INFORMATION RESPONSE message. The EPS bearer identity of the ESM INFORMATION RESPONSE message should be set to "no EPS bearer identity assigned" and include the PTI from the ESM INFORMATION REQUEST message.