Question: What is a key aspect of the Store-and-forward multimedia messaging service in MMS regarding message transmission between the network and terminals?
Option 1: Only batch delivery for both message download and upload, ensuring simultaneous transmissions.
Option 2: Exclusive support for streamed delivery to prioritize real-time communication over network efficiency.
Option 3: Support for both Streamed and Batch delivery methods for message downloads from the network to the terminal, and uploads from the terminal to the network.
Option 4: Mandatory peer-to-peer direct transmission without reliance on a central storage server.
Explanation: This option correctly highlights the flexibility in transmission methods (both streamed for potentially real-time or interactive content and batch for efficiency with less time-sensitive data) supported by MMS for both downloading from and uploading to the network. This dual capability enhances user experience by accommodating various types of multimedia content and network conditions, aligning with the service's goal of integrating different messaging types in a consistent manner.