Question Addressable building all streaming assets in one big chunk

Yo,
After building my app, which consisted of 100 seperate pngs, it gives one big chunk file,

My question is when user ask for one image (streaming asset) does the webserver send this big file back to user at once(network request) or there is some sort of compressing/decompression mechanism in server that is sending back only one image to user.(from server to user device)