cybersecurity Glossary

What is DNS?

DNS (Domain Name System) is an Internet protocol whose mission is to resolve domain names and translate them into IPs. This system’s main task is to convert a website’s terminology into binary identifiers associated with the computers connected to the network. Why? So that the IP address of each DNS entry can be located hierarchically.

At a higher level, there are top-level domains called TLDs, such as .com, .org, .net, and .security, which are associated with main DNS servers. These servers function as a decentralized database that stores all registered domains and DNS server information associated with each domain.

DNS is a fundamental part of the functioning of communication networks and the Internet. DNS responds by identifying the system (IP address) associated with a domain, which is then used by other communications protocols (BGP) to calculate the optimal route to access that network.

Historically, major service failures of Internet companies have been associated with failures in their DNS infrastructure.