Even Without Internet the link shows the image

I created a html file (mytest.html)that has bellow tag

<a href="https://pointsprizes-blog.s3-accelerate.amazonaws.com/485.jpg"> 
go to this link please</a>

I ran this link (https://pointsprizes-blog.s3-accelerate.amazonaws.com/485.jpg) in my browser first to see if it is a correct link, then I ran this file(mytest.html) in my pc & when I click the link "go to this link please" in the file, it showed the image.

I tried this without internet connection and it still showed the image correctly. Then I restarted the PC & ran the file and clicked the link (without internet connection) it still shows the file. My problem is how did my link shows the image without internet if it points to a website ?

Please give me an answer