What happens when you type google.com in browser?

March 20, 2021 Alice AUSTIN

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1. Browser does a DNS lookup of google.com
2. Multiple IP addresses could be returned from the DNS server if they wish to do Load-balancing.
3. These IP addresses can be IPv4 or IPv6.
4. The browser establishes a TCP connection with the web server.
5. If HTTP, it connects to port 80, if secure HTTPS it connects to port 443
6. Browser makes a HTTP GET request to the server
7. Web servers can redirect requests (like 301 Moved Permanently or 307 Temporary Redirect)
8. For a successful request, 200 status code is returned along with the HTML file.
9. The browser renders the page using the HTML response. If there are linked images, scripts and/or stylesheets, they are fetched using subsequent HTTP requests until all resources have been loaded.
10. Some of the resources may also be loaded from browser cache

source
ipv4