{"id":37302,"date":"2026-03-24T05:02:58","date_gmt":"2026-03-24T12:02:58","guid":{"rendered":"https:\/\/www.privateinternetaccess.com\/blog\/?p=37302"},"modified":"2026-05-27T06:50:03","modified_gmt":"2026-05-27T13:50:03","slug":"types-of-dns","status":"publish","type":"post","link":"https:\/\/www.privateinternetaccess.com\/blog\/types-of-dns\/","title":{"rendered":"What Are the Types of DNS Servers and How Do They Work?"},"content":{"rendered":"\n

Every time your device connects to a website, an app, or a service, it relies on the <\/strong>Domain Name System (DNS)<\/strong><\/a> to translate the human-readable name (e.g. www.privateinternetaccess.com) into an IP address so it can reach the correct server.<\/p>\n\n\n\n

But the DNS doesn\u2019t rely on a single server to resolve a domain name; it uses a network of different server types,<\/strong> each responsible for a specific step in the lookup process.\u00a0<\/p>\n\n\n\n

In this guide, we\u2019ll break down the main DNS server types, how they work together to resolve a domain, and how all of it can impact speed, reliability, and privacy.<\/p>\n\n\n\n

Types of DNS Servers<\/h2>\n\n\n\n

In a typical DNS lookup<\/a>, your request passes through four types of DNS servers:<\/strong><\/p>\n\n\n\n

\"Four<\/figure>\n\n\n\n

Recursive Resolver<\/h3>\n\n\n\n

The recursive resolver is the server your device interacts with. Its job is to contact other DNS servers to find the correct IP address<\/strong> of the server your device is trying to connect to. The recursive DNS server exists so your device doesn\u2019t have to take all of the load.\u00a0<\/p>\n\n\n\n

Once a recursive DNS server receives the answer, it sends it back to your device. <\/strong>It also maintains a cache of recent lookups<\/a> \u2014 more on that below.<\/p>\n\n\n\n

Internet Service Providers (ISPs) manage most recursive resolvers,<\/strong> but you can manually switch to a public DNS server<\/a> like Google DNS, which may offer better performance.<\/p>\n\n\n\n

Root Server<\/h3>\n\n\n\n

Root name servers direct the resolver to the next step in the lookup process.<\/strong> The root server looks at the domain extension of the DNS request, like the .com in privateinternetaccess.com, and points it to the correct Top-Level Domain (TLD) server.<\/p>\n\n\n\n

There are 13 logical root server names (A-root through M-root).<\/strong> Each root server is operated by a separate organization, with the L-root server being managed by ICANN1<\/sup>.<\/p>\n\n\n\n

TLD Server (Top-Level Domain Server)<\/h3>\n\n\n\n

A TLD DNS server stores a list of authoritative nameservers for all domains under its specific TLD.<\/strong> For example, a .com TLD server manages information for all .com domains, like google.com or privateinternetaccess.com. It stores the locations of authoritative nameservers that hold the IP addresses.<\/p>\n\n\n\n

Domain registries manage TLD servers under ICANN\u2019s oversight<\/strong> (Internet Corporation for Assigned Names and Numbers), maintaining consistency and governance across the global DNS infrastructure.<\/p>\n\n\n\n

Authoritative Nameserver<\/h3>\n\n\n\n

Authoritative nameservers provide the definitive answers in the DNS resolution process. These servers store essential DNS records that direct browsers to the correct resources<\/strong>, including IP addresses linked to domain names.<\/p>\n\n\n\n

The records include A records (which map domains to IPv4 addresses) and AAAA records (which map domains to IPv6 addresses). <\/strong>When a resolver contacts an authoritative nameserver, it returns the official IP address for the requested domain.<\/p>\n\n\n\n

Domain administrators typically configure two authoritative servers: a primary (master) and a secondary (slave) to ensure high availability. <\/strong>The primary server maintains the original zone file with read\/write access, while the secondary server holds a read-only copy obtained through zone transfers. This redundancy keeps domains accessible even when one server experiences downtime.<\/p>\n\n\n\n

How DNS Servers Work Together: Resolving a Domain<\/h2>\n\n\n\n
\"Image<\/figure>\n\n\n\n

Here\u2019s a step-by-step breakdown of how the main DNS server types work together when you access any online service. For this example, let\u2019s trace what occurs when you visit <\/strong>www.privateinternetaccess.com<\/em><\/strong>:<\/strong><\/p>\n\n\n\n

    \n
  1. You enter <\/strong>www.privateinternetaccess.com<\/em><\/strong> in your browser and press Enter: <\/strong>The browser now needs to find the IP address linked to that domain to start a connection.<\/li>\n\n\n\n
  2. Your device checks its local cache: <\/strong>The operating system first looks in its DNS cache to see if it already knows the IP address for www.privateinternetaccess.com.<\/em><\/li>\n<\/ol>\n\n\n\n