Domain Name System (DNS)
DNS is a process of mapping a human-friendly domain name to an IP address.
- DNS Root Servers: A group of servers to answer the root zone. Top Level Domains (TLDs) are controlled by the root zone database – Internet Assigned Numbers Authority (IANA).
- Domain Registrars: All domain names must be unique. A registrar is an authority that can assign domain names to top-level domains and ensure its uniqueness. Each domain name becomes registered in a central database (WhoIS server).