A look at something you've just used, DNS!
Note in my demo I request just the child part of the FQDN that the name server is authoritative for to avoid any cached entries return the final resolution too soon but as I said in the whiteboard the full FQDN is asked each time and you just get referred to the next nameserver down.
👂 I have manually updated the captions to be as accurate as possible. Enable the subtitles and from there you can translate to your native language via the auto-translate feature in settings! https://youtu.be/v5b53-PgEmI for a demo of using this feature.
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▬▬▬▬▬▬ C H A P T E R S ⏰ ▬▬▬▬▬▬
0:00 - Introduction
0:12 - Why we need DNS
2:07 - The structure of DNS hierarchy
6:15 - Recursive resolution
16:34 - Still need to use the name
18:55 - SNI and ClientHello
22:12 - Caching
25:05 - Cache poisoning
28:05 - Forwarding and summary
Correction:
19:10 syn syn-ack ack
▬▬▬▬▬▬ K E Y L I N K S 🔗 ▬▬▬▬▬▬
► Whiteboard:
🔗 https://github.com/johnthebrit/RandomStuff/raw/master/Whiteboards/HowDNSWorks.png
▬▬▬▬▬▬ Want to learn more? 🚀 ▬▬▬▬▬▬
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