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How DNS Works

John Savill's Technical Training
317K subscribers
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43K views 2 years ago #azure #johnsavillstechnicaltraining #cloud
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!    • YouTube Captions and Auto Translate Q...   for a demo of using this feature. 🔎 Looking for content on a particular topic? Search the channel. If I have something it will be there! ▬▬▬▬▬▬ 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 2 …...more
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How DNS Works
1.3KLikes
43,485Views
2023Jan 19
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!    • YouTube Captions and Auto Translate Q...   for a demo of using this feature. 🔎 Looking for content on a particular topic? Search the channel. If I have something it will be there! ▬▬▬▬▬▬ 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/Random... ▬▬▬▬▬▬ Want to learn more? 🚀 ▬▬▬▬▬▬ 📖 Recommended Learning Path for Azure 🔗 https://learn.onboardtoazure.com 🥇 Certification Content Repository 🔗 https://github.com/johnthebrit/Certif... 📅 Weekly Azure Update 🔗    • Azure Infrastructure Updates   ☁ Azure Master Class 🔗    • Microsoft Azure Master Class v2 (bein...   ⚙ DevOps Master Class 🔗    • DevOps Master Class   💻 PowerShell Master Class 🔗    • PowerShell Master Class   🎓 Certification Cram Videos 🔗    • Microsoft Certification Exam Prep Videos   🧠 Mentoring Content 🔗    • Virtual Mentoring   ❔ Questions? Maybe I answered it in my FAQ 🔗 https://savilltech.com/faq.html 👕 Cure Childhood Cancer Charity T-Shirt Channel Store 🔗 https://johns-t-shirts-store.creator-... SUBSCRIBE ✅    / @ntfaqguy   #microsoft #azure #johnsavillstechnicaltraining #onboardtoazure #cloud
19:10
syn syn-ack ack

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John Savill's Technical Training

317K subscribers
19:10
syn syn-ack ack