DNS, or Domain Name System, is an essential component of the internet infrastructure. It is a decentralized system that translates human-readable domain names, such as example.com, into machine-readable IP addresses, like 192.0.2.1. In simpler terms, it enables us to access websites by using memorable names instead of complicated numerical addresses. To understand what is DNS, we’ll begin with the basics. From there, we’ll dive into its core components. Next, we’ll examine the different types of DNS services. And finally, we’ll discuss common pitfalls and security best practices.