What is a name server and DNS for a domain? – WP reset

When you create a website, the way your domain directs visitors to your web content is probably the most important (and also taken for granted) background process. They are routed through the Domain Name System (DNS) and name servers. It is especially necessary to understand how they work when you register a new domain name, because it determines how your website is visited on the Internet.

The basics: what is DNS?

The Domain Name System, or DNS, is essentially the Internet’s address book. When you type a web address (such as example.com) into your browser, DNS is the process that translates the human-readable name into an IP address (such as 192.0.2.1) that computers use to locate each other. Without DNS, you would have to remember and type long strings of numbers to visit websites – an impossible and maddening task.

That is, DNS acts as an intermediary for the domain names we understand and the IP addresses that computers need to communicate. When you visit a site, send email, or stream media, DNS works behind the scenes to get your request where it needs to go.

What are name servers?

While DNS is the overall system that oversees domain-to-IP translation, name servers are physical servers that host your domain’s DNS data. They can be considered the “administrators” of your domain’s DNS data.

All domains require at least two name servers, and they are responsible for telling the Internet where your emails and website are located. When someone tries to visit your website, the browser asks the name servers, “Where is this domain?” The name servers respond with the correct IP address and the browser displays the correct website.

For example, if your domain is hosted on a host like Bluehost or Cloudflare, the name servers will look like this:

• ns1.bluehost.com
• ns2.bluehost.com

These servers contain the DNS records that point traffic to your hosting host.

How DNS and name servers work together

The process of translating a domain name to an IP address consists of several steps:

1. User request: You type a domain (for example, example.com) into your browser.
2. DNS resolver: Your Internet Service Provider (ISP) instructs a DNS resolver to look up the IP address of the domain.
3. Look up name server: The solver queries the domain’s name servers.
4. DNS records response: The name servers respond with the IP address of the domain.
5. Connection established: Your browser uses that IP address to establish the correct web server connection and display the website.

This all happens in milliseconds, but is important for the seamless operation of the Internet.

Types of DNS records

Name servers contain a list of DNS records, each for a specific purpose. These are the most common types:

• A record: Converts your domain to an IPv4 address.
• AAAA Record: Converts your domain to an IPv6 address.
• CNAME record: Converts one domain to another (e.g. www.example.com → example.com).
• MX record: Directs email traffic to the correct mail server.
• TXT record: Often stores text data for authentication or security purposes (for example, SPF, DKIM, and Google authentication).
• NS record: Specifies the name servers that are authoritative for the domain.

It’s useful to be aware of this data when you update your domain settings, configure email, or verify ownership with providers like Google Workspace or Microsoft 365.

Change name servers

Most web hosts and registrars allow you to manage your name servers from your account control panel. For example, if you registered your domain name with one company but host your website with another company, you will need to update your name servers to reflect your web host.

Here is a simple step-by-step process:

1. Log in to your domain registrar account.
2. Find your domain and click Manage DNS or Name Servers.
3. Change the default name servers to the name servers provided by your web host.
4. Save and wait for the DNS propagation time (this can take 24 to 48 hours).

After the update, your domain will automatically point users to the new server address.

Why name servers and DNS are important

Name servers and DNS are not technical details; they determine how available, stable and fast your website is. Improperly configured DNS can cause your site or emails to stop working altogether, and optimized settings can make your site run faster, load faster, and be delivered securely.

In addition, DNS is also an important part of cybersecurity. Most attacks, such as DNS spoofing or cache poisoning, use DNS vulnerabilities to redirect users to a spoofed website. Therefore, recent hosting and DNS providers are using technologies such as DNSSEC (Domain Name System Security Extensions) to protect users from such attacks.

Understanding name servers and the Domain Name System (DNS) is key to controlling your Internet presence. They work in the background, but are critical to ensuring your domain name resolves correctly to your site.

So when you sign up for a new domain, it’s worth the extra few seconds to double-check your name server settings and DNS settings. This ensures that your website is properly connected, encrypted, and ready for anyone who types in your web address, anywhere in the world.