What is DNS cache and how does it work?

You’ve come to the right place if you’re looking for an explanation of DNS cache. In this article, we’ll take a closer look at its purpose, as well as its function and benefits.

DNS cache purpose

DNS cache memory is a type of temporary cache memory used by DNS resolvers and other devices. Initially applied DNS records of searched domain names are retained in that memory. These records contain the domain names’ IP addresses (IPv4 or IPv6), as well as information about their email server, information about their services, authentication and verification data, and more. The DNS cache will save all of the data. However, as aforementioned, it will only be for a limited period of time, as set by the TTL (Time to Live) number assigned to each DNS record.