The latest articles on DEV Community by Fena Onditi (@fonditi). https://dev.to/fonditi https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F1775137%2F5edd04cc-46f4-4aa9-b374-679841077cda.png https://dev.to/fonditi en Fena Onditi Sun, 14 Jul 2024 05:46:54 +0000 https://dev.to/fonditi/what-happens-when-you-enter-a-domain-name-eg-googlecom-into-a-browser-3mn9 https://dev.to/fonditi/what-happens-when-you-enter-a-domain-name-eg-googlecom-into-a-browser-3mn9 <p>Flow of Request for <a href="https://www.google.com" rel="noopener noreferrer">https://www.google.com</a></p> <ol> <li> <p>DNS Resolution:</p> <ul> <li>Browser initiates DNS resolution to translate "<a href="http://www.google.com" rel="noopener noreferrer">www.google.com</a>" to an IP address. Resolved IP address is returned.</li> </ul> </li> <li> <p>TCP/IP Connection:</p> <ul> <li>Browser establishes a TCP/IP connection with the web server's IP address on port 443 (HTTPS).</li> </ul> </li> <li> <p>HTTPS/SSL Encryption:</p> <ul> <li>Data between browser and server is encrypted via HTTPS/SSL. SSL handshake ensures secure communication.</li> </ul> </li> <li> <p>Firewall Inspection:</p> <ul> <li>Encrypted traffic passes through a firewall for security policy checks and threat protection.</li> </ul> </li> <li> <p>Load Balancer:</p> <ul> <li>Connection is routed through a load balancer for traffic distribution across multiple web servers.</li> </ul> </li> <li> <p>Web Server:</p> <ul> <li>Load balancer forwards the connection to a web server hosting the Google website. Web server handles HTTP requests and connections.</li> </ul> </li> <li> <p>Application Server:</p> <ul> <li>Web server delivers the request to an application server, which processes the request and generates a response. Application server may execute server-side scripts and interact with a database.</li> </ul> </li> <li> <p>Database:</p> <ul> <li>Application server may request data from a database for information required in the response.</li> </ul> </li> <li> <p>Web Server (Response):</p> <ul> <li>Application server returns the response to the web server.</li> </ul> </li> <li> <p>Load Balancer (Response):</p> <ul> <li>Load balancer receives the response, typically a dynamic one from the application server.</li> </ul> </li> <li> <p>TCP/IP (Response):</p> <ul> <li>Load balancer routes the response back through the TCP/IP stack.</li> </ul> </li> <li> <p>Firewall (Response):</p> <ul> <li>The firewall inspects the incoming response for security compliance.</li> </ul> </li> <li> <p>Browser (Response):</p> <ul> <li>The firewall returns the response to your browser, which decrypts and renders the content, allowing you to interact with the Google website. <img src="https://media.dev.to/cdn-cgi/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fe5nz0a8hmw6bczjdczxl.jpeg" alt="Image description" width="800" height="393"> </li> </ul> </li> </ol> dns browser internet