About add 3D Tileset (Quantized-mesh terrain and Terrain asset)

Hello…

I’m very confused.

Reference URL : Adding Datasets – Cesium
Reference Information :
" Currently, loading local quantized-mesh terrain files using Cesium for Unreal is not supported. However, terrain assets can be loaded from any server, including localhost . To load terrain assets completely offline, consider setting up a localhost to serve the terrain. The Url field can be filled using the same steps as above with http://localhost:portNumber/terrainAsset ."

Below is my question…

Question 1)
How is the meaning of the “Quantized-mesh terrain and Terrain asset” different?
“Terrain asset” means the data on “Cesium ion”?
“Quantized-mesh terrain” means “GitHub - CesiumGS/quantized-mesh: Specification for streaming massive terrain datasets for 3D visualization.”?
Can’t “Quantized-mesh terrains” be included in “Terrain asset” as a format?

Question 2)
Is “Quantized-mesh terrain” impossible to load from the server(My online server)?

I need your help on this question.
I look forward to your reply.