Question Dedicated Server Build - Screen Size

Hey, when running unity in headless mode using the new dedicated server build target, I'm wondering where Unity is getting the screen size value from?

Code (CSharp):

1. public class ApplicationLoader : MonoBehaviour {
2.  
3.     private void Start() {
4.  
5.         Debug.Log("Starting Dedicated Server");
6.         Debug.Log($"Screen width: {Screen.width}, Screen height: {Screen.height}");
7.         Debug.Log($"Screen dpi: {Screen.dpi}");
8.         Debug.Log($"Current resolution: {Screen.currentResolution}");
9.         Debug.Log($"Fullscreen: {Screen.fullScreen}");
10.         Debug.Log($"Fullscreen mode: {Screen.fullScreenMode}");
11.  
12.         foreach (var resolution in Screen.resolutions) {
13.  
14.             Debug.Log($"\tresolution: {resolution}");
15.         }
16.     }
17. }

I was not expecting the Screen to have any size when running in headless mode. Kind of surprised by it.

Would just like to know what defines this?

I'm running this directly from my Windows PC.