DNS stands for Domain Name System, which is a system that translates human-readable website addresses (domain names) into IP addresses, which are used by computers to route traffic on the Internet.
For example, when you type in www.google.com into your browser, it will look up this domain name in its DNS database and send your request to Google's servers.
DNS servers are located all over the world and are maintained by different organizations such as enterprise networks, ISP, and other groups of public or private persons.
Your computer has a "hostname" that's easy to remember, such as "google.com," but your computer can't communicate with other computers using only this name.
It also needs an IP address, which is a series of numbers separated by periods. Computers use IP addresses to route traffic between them.
DNS translates hostnames, which are easy for people to remember, into IP addresses, which computers use to communicate over the Internet.
It also translates subdomains into IP addresses for their respective domain names (e.g., "www" in the URL "www.google.com").
DNS records are the data that make up a DNS zone. Each domain has its own set of records, but there are some common ones that you'll see in most zones.
Here are some DNS record types you might encounter:
DNS records are the building blocks of your website. They are the information that tells people where to find your site on the internet. If your DNS records are changed or deleted, visitors trying to reach your site could be sent to a different location or nowhere at all!
If you have an e-commerce site, it's important that you monitor your DNS records because they can be used to redirect visitors away from your store and toward another business. This is commonly known as phishing or pharming. You may have heard stories of people receiving emails asking them to update their account information and when they click on the link provided in the email, they are actually taken to another website.
If you don’t monitor DNS records, then you’re not monitoring the health and security of your website. DNS is one of the most common targets for attackers because it’s so easy to compromise.
You can use a free tool like MonSpark to keep an eye on your DNS records, so you'll always know when they've been changed.