Does a browser have to make multiple requests to verify an SSL certificate chain?

I've learned that SSL certificates can be chained, and the browser will use the issuer's public key to verify the issuer's signature. I have read this article, which has a very helpful diagram, but it doesn't answer my specific question. SSL Certificate framework 101: How does the browser actually verify the validity of a given server certificate?

In the case of a 5-level certificate chain, does the browser:

• Get the first 4 certificates in a single request to the original website?
  
  
  
  • Is it 4 separate files, or 1 file containing all 4 certificates?
  
  
  
  


• Or get one certificate at a time after processing each one (4 separate requests)?
  
  
  
  • If every issuer is from a different domain, does the browser get the certificates from 4 different domains, or just from the original website?
  
  
  
  


• Or some other method?