When you type "google.com" into your web browser, have you ever wondered what happens behind the scenes? It may seem like a simple action, but there's actually a lot going on at the networking level

When you type "google.com" into your web browser, have you ever wondered what happens behind the scenes? It may seem like a simple action, but there's actually a lot going on at the networking level.

To understand what happens, let's break it down step-by-step:

Your browser sends a request to a DNS server to resolve the IP address of "google.com". The DNS server is a specialized server that maintains a database of domain names and their corresponding IP addresses. When you enter a URL into your browser, your browser sends a DNS query to a DNS server to translate the domain name into an IP address. If the DNS server has the IP address cached, it returns it to your browser. If it doesn't have the IP address, it sends a query to other DNS servers until it finds the correct IP address.

Once your browser knows the IP address of the server that hosts "google.com", it establishes a TCP connection with the server. TCP is a protocol that allows reliable communication between two devices. When your browser establishes a TCP connection with the server, it goes through a three-way handshake process to ensure that both devices are ready to communicate.

During the handshake process, your browser sends a SYN packet to the server, the server responds with a SYN-ACK packet, and your browser sends an ACK packet back to the server.

After the TCP connection is established, your browser sends an HTTP request to the server. HTTP is a protocol that defines how data is transmitted over the internet. The HTTP request contains information such as the method (e.g. GET or POST), the requested URL, and headers that provide additional information about the request.

The server receives the HTTP request and generates an HTTP response. The response contains information such as the status code (e.g. 200 OK, 404 Not Found), headers that provide additional information about the response, and the content of the response (e.g. HTML code, image data). The server uses the requested URL to determine which resource to return in the response.

Your browser receives the HTTP response and begins to render the web page. It first parses the HTML code and creates a Document Object Model (DOM) tree that represents the structure of the web page. It then executes any JavaScript code that is included in the web page. Finally, it downloads any additional resources such as images, stylesheets, or videos that are referenced in the HTML code.

Once all resources have been downloaded and the web page has been fully rendered, you can interact with the website. Your browser allows you to click on links, fill out forms, and perform other actions on the web page.

I hope this provides a more detailed explanation of what happens when you type "google.com" into your web browser.

If you have any questions or want to learn more about networking, feel free to leave a comment below with the word "networking".