unity-networking

Multiplayer networking in Unity uses frameworks like Netcode for GameObjects, Mirror, or Photon to establish client-server architectures. You define NetworkBehaviours with NetworkVariables for synchronized state and ServerRpcs for remote procedure calls, enabling real-time state synchronization across connected clients.

Lag compensation combines client prediction, server authority, and interpolation to mask latency. Apply client-side prediction to predict player movement, validate actions on the server, and use interpolation on receiving clients to smooth remote player positions between network updates.

Network variables automatically synchronize state across clients when values change on the server. RPCs trigger specific methods on remote machines for events that don't require continuous synchronization, like ability activations or one-time actions that need immediate execution.

Yes. Client-server architecture with transform synchronization sends position and rotation updates from authoritative servers to clients. Apply delta compression to reduce bandwidth, then use interpolation on clients to smooth movement between discrete network updates.

Packet loss drops network updates, causing desynchronization between server and clients. Mitigate this by using reliable delivery channels for critical state changes, implementing resync mechanisms, and testing with network simulation tools to identify and fix synchronization failures.

Debug networking using built-in network simulation tools to inject latency and packet loss, then observe client-server behavior. Log state changes, RPC calls, and synchronization events; compare client and server state to identify desynchronization or lag compensation failures.