DNS records are sets of instructions that live on DNS servers. These instructions are vital to the success of a DNS lookup.
After reading this article you will be able to:
DNS 'A' Record
DNS 'MX' Record
What Is DNS?
DNS Root Server
DNS Server Types
DNS records (aka zone files) are instructions that live in authoritative DNS servers and provide information about a domain including what IP address is associated with that domain and how to handle requests for that domain. These records consist of a series of text files written in what is known as DNS syntax. DNS syntax is just a string of characters used as commands which tell the DNS server what to do. All DNS records also have a ‘TTL’, which stands for time-to-live, and indicates how often a DNS server will refresh that record.
You can think of a set of DNS records like a business listing on Yelp, that listing will give you a bunch of useful info about a business such as their location, hours, services offered, etc. All domains are required to have at least a few essential DNS records for a user to be able to access their website using a domain name, and there are several optional records that serve additional purposes.