DNS Types: 3 Types of DNS Servers
DNS Resolver
A DNS resolver (recursive resolver), is designed to receive DNS queries, which include a
human-readable hostname such as “www.example.com", and is responsible for
tracking the IP address for that hostname.
DNS Root Server
The root server is the first step in the journey from hostname to IP address. The DNS
Root Server extracts the Top-Level Domain (TLD) from the user’s query-for
example, www.example.— and provides details for the .com TLD Name Server.
Authoritative DNS Server
Higher-level servers in the DNS hierarchy define which DNS server is the
“authoritative” name server for a specific hostname, meaning that it holds the up-to-
date information for that hostname.
The Authoritative Name Server is the last stop in the name server query-it takes the
hostname and returns the correct IP address to the DNS Resolver (or if it cannot find
the domain, returns the message NXDOMAIN)