What Happens When You Type a URL

A print-ready, 2-page A4 cheat sheet for the most-asked interview question in tech, distilled from my video.

Front: the whole journey in five memorizable steps — name → number, handshake, encrypt, request, render — with the numbers that impress: four DNS caches, port 443, SYN/SYN-ACK/ACK, 200 ms cross-planet vs 5 ms edge round trips, ~70 requests per page, under a second total.

Back: the classic walkthrough answer plus 5 deep-dive follow-ups — DNS resolution, TCP vs TLS handshakes, HTTP/2 multiplexing, why CDNs matter, and what the browser does with the HTML (including why JavaScript blocks parsing) — complete answers, plus 3 traps.

For SDE / frontend / backend interview prep — every level gets asked this. Instant download.