What happens when you enter the address of your personal website in your browser? Deep discussion on this topic alongwith protocol , DNS table etc. Make sure that you do not have any vague idea about this in any step

Question

Accepted Answer

When you enter the address of your personal website into your browser, several steps occur behind the scenes to bring up the webpage. Let's break it down:

Domain Name System (DNS) Resolution: The first step is DNS resolution. The browser checks its cache to see if it already knows the IP address associated with the domain name. If not, it sends a DNS query to a DNS server.

DNS Server Lookup: The DNS server receives the query and looks up the domain name in its DNS tables. If it finds a match, it returns the corresponding IP address to the browser. This IP address is the numerical address that uniquely identifies the web server hosting your website.

TCP/IP Connection: Once the browser has the IP address, it initiates a TCP/IP connection to the web server. This involves a three-way handshake process where the browser and the server establish a connection.

HTTP Request: With the connection established, the browser sends an HTTP request to the web server. This request includes information about the specific page being requested, such as the URL and any additional parameters.

Server Processing: The web server receives the HTTP request and processes it. It locates the requested webpage on its file system or generates it dynamically if it's a database-driven website.

HTTP Response: After processing the request, the web server sends back an HTTP response to the browser. This response includes the requested webpage content along with metadata such as HTTP headers.

Rendering: Finally, the browser receives the HTTP response and renders the webpage according to the HTML, CSS, and JavaScript code it contains. This involves parsing the HTML to create the Document Object Model (DOM), applying styles from CSS, and executing any JavaScript code.

Throughout this process, several protocols are involved:

DNS (Domain Name System): Resolves domain names to IP addresses.
TCP/IP (Transmission Control Protocol/Internet Protocol): Establishes connections and facilitates data transfer between devices on the internet.
HTTP (Hypertext Transfer Protocol): Defines how messages are formatted and transmitted, and how web servers and browsers respond to various commands.
Each step in this process is crucial for the successful retrieval and display of your personal website in the browser.

What happens when you enter the address of your personal website in your browser? Deep discussion on this topic alongwith protocol , DNS table etc. Make sure that you do not have any vague idea about this in any step

Popular interview questions of Softwaretest Engineer

Top HR questions asked in JPMorgan Chase & Co. Softwaretest Engineer