Unity Networking

Question 1

What is HLAPI?

Answer 1

High Level API - it provides simple and secure client/server network model

Question 2

What does the Network Manager do?

Answer 2

This Network Manager can control the state of a Multiplayer project, including game state management, spawn management, scene management, matchmaking and allowing access to debugging information.

Question 3

What function is a good place to do initialization that is only for the local player, such as configuring cameras and input?

Answer 3

OnStartLocalPlayer

Question 4

What class should a script using network functions derive from?

Answer 4

NetworkBehaviour rather than MonoBehaviour.

Question 5

What namespace does a script need to use network functions?

Answer 5

UnityEngine.Networking

Question 6

How would you add a check to see if gameobject is linked to the local player?

Answer 6

isLocalPlayer

Question 7

What component would you add to a gameobject to keep it’s position in sync with the server?

Answer 7

a NetworkTransform

Question 8

How do you speed up the server updating rate on an object that is randomly changing position?

Answer 8

Increase the Network Speed Rate on the NetworkTransform

Question 9

What component controls an object’s network identity?

Answer 9

NetworkIdentity

Question 10

How do you add a new prefab that will be spawned sometime in the future?

Answer 10

With the NetworkManager selected, add the prefab to a new row in the Registered Spawnable Prefabs list.

Question 11

How do you indicate that a function will be called by the Client, but will be run on the Server?

Answer 11

By adding the [Command] attribute before the function

Question 12

When making a networked command, what must the function name begin with?

Answer 12

“Cmd”

Question 13

What does “Spawn” mean in regards to Multiplayer Networking HLAPI?

Answer 13

It means to create a GameObject on the Server and on all of the Clients connected to the Server. The GameObject will then be managed by the spawning system; state updates are sent to Clients when the object changes on the Server

Question 14

How do you “spawn” a gameobject?

Answer 14

NetworkServer.Spawn(gameobject);

Question 15

How would you make important variables such as player health and damage network aware and working under Server authority?

Answer 15

By using State Synchronization and a special member variable on networked objects called SyncVars

Question 16

How do you indicate a variable is a Network synchronized variable?

Answer 16

By adding [SyncVar] before the variable

Question 17

How do you check if script is being run on the server?

Answer 17

isServer

Question 18

How would you call a function on the Server, but execute it on the Clients?

Answer 18

Make the function into a ClientRpc call, use the [ClientRpc] attribute and add “Rpc” as a prefix to the name of the function.

Question 19

How do you set a gameobject to be a potential spawn point?

Answer 19

By adding a NetworkStartPosition component

Question 20

How do you sync a gameobject’s animations with the server?

Answer 20

by adding a NetworkAnimator

Question 21

What does it mean to run a server in “headless mode”?

Answer 21

A headless system is a computer that operates without a monitor, graphical user interface (GUI) or peripheral devices, such as keyboard and mouse.

Question 22

How do you set a gameobject’s visibility to only be visible within a player’s “area of interest”?

Answer 22

By adding a NetworkProximityChecker

Question 23

When does the server update SyncVar values to clients?

Answer 23

SyncVar updates are sent automatically by the server to all the clients when the value of a SyncVar changes on the server.

Question 24

Do SyncVars that change on the client automatically change on the server?

Answer 24

No, SyncVars update to the clients from the server