Question: When is the Protocol Configuration Options Information Element included in a message?
Option 1: When the MS and the network support extended protocol configuration options IE for the PDN connection.
Option 2: When the network wishes to transmit protocol data to the MS and both ends support extended protocol configuration options IE end-to-end for the PDN connection.
Option 3: When the network wishes to transmit protocol data to the MS and the extended protocol configuration options IE is not supported by the MS or the network or both end-to-end for the PDN connection.
Option 4: When the MS initiates a request for protocol configuration options.
Explanation: The Protocol Configuration Options Information Element is included in a message when the network wants to send protocol data (like configuration parameters, error codes, or messages/events) to the Mobile Station (MS), and either the MS or the network (or both) do not support extended protocol configuration options IE for the PDN connection. This ensures that essential information can still be communicated even if advanced features are not supported by one or both parties involved in the communication.