What is an advantage of Unity's built-in transport layer?

Unity's built-in transport layer is designed specifically to facilitate efficient data transmission for multiplayer networking. This is crucial in online games where multiple players need to communicate with each other in real-time. The built-in transport layer provides a streamlined way to send and receive data packets, ensuring that information such as player movements, game state changes, and chat messages are delivered swiftly and reliably. By optimizing this aspect of networking, Unity helps developers create a seamless multiplayer experience with reduced lag and improved synchronization of actions among players.

The other choices, while they may pertain to different aspects of game development, do not accurately reflect the core benefits of the built-in transport layer. Improving graphics quality and sound quality involves different systems and components focused on rendering visual details or audio effects, respectively. Eliminating the need for third-party plugins might be a perceived benefit, but the transport layer specifically addresses data transmission needs rather than the use of plugins in other game development areas.