The Domain Name System (DNS) is a system of databases that maintains a directory of domain names and their corresponding IP addresses. DNS servers are responsible for resolving domain names into IP addresses, making it possible for users to access websites by name rather than by IP address.

DNS servers are typically included as part of the network infrastructure of an organization. However, they can also be provided as a public service by an Internet Service Provider (ISP), or they can be run by a third party organization.

When a computer needs to resolve a domain name into an IP …