What is DNS TTL (Time to live) ? скачать в хорошем качестве

What is DNS TTL (Time to live) ?

How does your computer know when to get fresh data for a website versus using information it already has? It all comes down to a simple but powerful setting called Time-to-Live, or TTL. TTL is a countdown timer attached to every DNS record, telling servers and resolvers exactly how long they should trust their cached information before needing to ask for a new copy. This simple number is crucial for balancing website speed against how quickly your domain's changes go live. In this video, we'll explain exactly how TTL works, from its definition in foundational internet documents like RFC 1035 to a complete, step-by-step walkthrough of a DNS record's lifecycle. From its creation on an authoritative server to its final expiration, you'll see precisely how TTL dictates the flow of DNS information across the internet. Looking for streamlined DNS management with thoughtful design and constant innovation? Give DNSimple a try free for 30 days for yourself: https://dnsimple.com/signup ➡️ JUMP TO THE SECTION YOU NEED: 0:00 - Intro: What is TTL? 0:26 - TTL in DNS (RFC 791 & RFC 1035) 1:23 - The DNS Record Lifecycle 1:27 - Step 1: Record Configuration 1:43 - Step 2: Authoritative Response 1:53 - Step 3: Caching at the Resolver 2:11 - Step 4: TTL Countdown 2:45 - Step 5: Serving Cached Records 3:00 - Step 6: Expiration and Cache Refresh 3:17 - Visualization of the TTL Process 4:01 - Outro In this comprehensive guide to DNS Time-to-Live, you will learn: ✅ What is TTL? Understand its fundamental role in DNS resolution and caching. ✅ The DNS Record Lifecycle: A step-by-step breakdown from creation on the authoritative server to expiration in a resolver's cache. ✅ TTL and Performance: Learn how TTL values directly impact website speed and DNS propagation time. ✅ Practical DNS Management: See how resolvers use TTL to decide between serving fast, cached data and requesting fresh records. ✅ Technical Foundations: Get a plain-language summary of how TTL is defined in core internet documents like RFC 1035. This video is perfect for network engineers, web developers, system administrators, and anyone wanting to understand the essential technologies that make the internet fast and efficient. 👍 If this explanation of DNS TTL was helpful, please like and subscribe for more deep dives into internet technology. ❓ Have questions about TTL, DNS propagation, or other topics? Ask in the comments! ❓Want to read more about TTL? Visit https://support.dnsimple.com/articles... #DNS #TTL #TimeToLive #DNSCaching #WebPerformance #Networking #DNSExplained #HowDNSWorks #TechTutorial #DNSRecords Prefer to read? Try our comics! 💥------------Webcomics-----------💥 🔗 https://howdns.works/ 🔗 https://howhttps.works/ 🔗 https://howdnssec.works/ 👩🏻‍💻👨🏿‍💻--------Developer Tips--------👨🏼‍💻👩🏾‍💻 🔗 API with DNSimple: https://dnsimple.com/api/ 🔗 GitHub repository: https://github.com/dnsimple/ 📂 Developer Documentation: https://developer.dnsimple.com/ 👋 👋------Contact Us----- 👋 👋 ➡️ DNSimple: https://dnsimple.com/contact ➡️ LinkedIn: @dnsimple /   / dnsimple   ➡️ Facebook: dnsimple /   / dnsimple   ➡️ Instagram: / dnsimple ➡️ Mastodon: https://dnsimple.social/@trusty ➡️ Bluesky: https://bsky.app/profile/dnsimple.bsk...