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Technologies

What is a DNS?

10 November 2017

In the articles of the “What is DNS?” series you will find answers to questions such as: why and how the domain name is defined, what is the difference between DNS servers and DNS records, why there is a propagation period after updating DNS information, and so on.

DNS Cache and TTL for DNS Records (What is а DNS?)

10 November 2017

The time set in the DNS record TTL tells the DNS caching server for what period the record is considered up-to-date and can be stored in the cache. Typically, a TTL is set between 2 and 48 hours, and therefore, after changing the DNS information, a global refresh period of 2 to 48 hours is given.