Your question is Deep Dive: DNS, TCP, TLS, and Proxies. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you explain what happens when a user enters a website URL, including DNS, TCP handshake, ports, and TLS proxy behavior like SSL termination?