What sequence does a browser follow when a user enters a URL and hits Enter?

What sequence does a browser follow when a user enters a URL and hits Enter?

• A. Resolve the domain, open a connection, send an HTTP request, and receive the response
• B. Reboot the computer
• C. Email the server
• D. Download all installed apps

Answer: (A)

When you enter a URL, the browser must first find where to connect by resolving the domain to an IP address using DNS. Once it knows the address, the browser opens a connection to that server—typically a TCP connection, and if the site uses encryption, a TLS handshake happens to establish a secure channel. After the connection is set up, the browser sends an HTTP request for the resource (for example, a GET request for the page) and the server replies with an HTTP response that includes a status code, headers, and the content. The browser then renders the page and often makes additional requests for linked resources like CSS, JavaScript, and images, using optimized protocols such as HTTP/2 or HTTP/3. Rebooting the computer, emailing the server, or downloading all installed apps aren’t part of this page-load sequence.

When you enter a URL, the browser must first find where to connect by resolving the domain to an IP address using DNS. Once it knows the address, the browser opens a connection to that server—typically a TCP connection, and if the site uses encryption, a TLS handshake happens to establish a secure channel. After the connection is set up, the browser sends an HTTP request for the resource (for example, a GET request for the page) and the server replies with an HTTP response that includes a status code, headers, and the content. The browser then renders the page and often makes additional requests for linked resources like CSS, JavaScript, and images, using optimized protocols such as HTTP/2 or HTTP/3. Rebooting the computer, emailing the server, or downloading all installed apps aren’t part of this page-load sequence.