How DNS, TCP, TLS & HTTP Actually Work

Hey guys, this post is a massive one for any beginner or for intermediate one's in security field as i am sure of it. I explained all the concepts in detail and recommended to complete this post and have a good understanding about How things work behind your device, as of this post we discuss only about DNS ,TCP,TLS,HTTP. Every time you type a URL into your browser and hit Enter, a surprisingly complex sequence of events unfolds in milliseconds. Most people think "the page just loads" — but underneath there are at least four distinct protocols working together in a precise order. The full journey looks like this: 1.DNS Resolution — translate the human-readable domain name into an IP address 2.TCP Handshake — open a reliable connection to that IP address 3.TLS Handshake — secure the connection with encryption 4.HTTP Request/Response — fetch and receive the actual web content 5.TCP Termination — cleanly close the connection This guide walks through each stage in depth. By the end you wil