example.com. 3600 IN A 192.0.2.1 www 3600 IN CNAME example.com.
Here is a deep dive into what TTL 3600 actually is, how it works, and why it is the "Goldilocks" setting for millions of websites. What is TTL?
stands for Time to Live . In the context of the Domain Name System (DNS), it is a numerical value (measured in seconds) that tells a DNS resolver (like your ISP or Google DNS) how long to "cache" or remember a DNS record before asking the authoritative server for a fresh update.
: For dynamic DNS records where the IP address can change frequently (e.g., in the case of some broadband connections that get a new IP address from the ISP periodically), a lower TTL like 3600 helps in ensuring that the cached record does not remain outdated for too long. ttl 3600
“This record should be considered valid for 3600 seconds (1 hour) before being refreshed.”
Without TTL, your computer would have to ask for the IP address of a website every single time you clicked a link, which would drastically slow down the internet and overwhelm DNS servers. Breaking Down the Math: Why 3600?
If you are setting up a new domain and aren't sure what to choose, is almost always the safest and most efficient bet. example
So ttl 3600 means:
In domain management, you set TTL on record types like:
By caching the record for an hour, the user's browser doesn't have to perform a DNS lookup for every single page request. This shaves milliseconds off your load time, improving the overall user experience and SEO. 3. Reduced Server Load What is TTL
client.set('key', 'value', 'EX', 3600);
Cache-Control: max-age=3600
Key auto-deletes after 3600 seconds.