Question: What is the primary purpose of the Wireless Control Message Protocol (WCMP) in the context of SMS?
Option 1: To ensure reliable retransmission of packets by notifying senders of errors due to routing issues, unlistening destination ports, or insufficient buffer capacity.
Option 2: To manage congestion control in telecom networks by dynamically adjusting buffer capacities at the receiver end.
Option 3: To provide an additional layer of encryption for sensitive information transmitted via SMS.
Option 4: To facilitate the handover process between different wireless networks.
Explanation: WCMP's primary function is to notify senders of errors (e.g., routing problems, no application listening at the destination port number, or insufficient buffer capacity), allowing them to avoid unnecessary retransmissions, supporting efficient management of packet transmission in SMS services.