What is Anycast DNS & How does it Work?

Anycast DNS is a fantastic service that might benefit your company. It allows you to surf the web considerably more quickly and efficiently. So, let’s dig a little deeper into that.

What does Anycast DNS mean?

Anycast DNS is a routing mechanism that employs a simple trick: all instances have the same IP address. Therefore, you’ll have a network of Anycast DNS servers with the same IP address if you use it. Yes, this is doable, and there is no difficulty with the network. The benefit is that anybody who searches your domain name will obtain the same IP address, regardless of where they are in the world. The request will then proceed to this IP address, and because it is the same IP address, it will receive a response from the nearest Anycast DNS server. This saves time and ensures redundancy since if one server goes down, the request will travel a little further and receive a response from the next Anycast DNS server on the network.

Additional information about Anycast DNS

How does it work?

When a device connects to the Internet, it communicates with a server using its IP address. The most basic form of communication is one-to-one communication. This is acceptable, and DNS resolution may be possible. If only one server has the required data (A or AAAA record) and it is far away, specific requests will have to travel long distances to reach it. The user will not receive the intended response if the server is down. The query will remain unanswered.

Benefits of using it

Anycast DNS can be really advantageous. Here are some of its main benefits:

  • The first is that it is straightforward to set up. It’s simple to set up because everything is done on a single server. Moreover, comparable changes can be performed throughout the network.
  • The increased uptime is the second reason you should choose it. Although a server can fail, the chances of a collection of servers failing at the same time are exceedingly rare. Your website’s uptime will improve as a result, and your users will be able to access it at any time. Furthermore, the response time is quicker. The waiting time is greatly decreased when your servers answer rapidly. A small percentage of potential clients will abandon your website.
  • The final benefit is enhanced security. DoS and DDoS assaults can be carried out in various methods, but they all leverage massive amounts of traffic as a weapon against flood victims. The technology employed to prevent and defend against such attacks is typically complex and expensive. Because Anycast DNS is so good at load balancing, the unusual traffic could be distributed around the network without causing a problem. If you apply this fantastic method, your security will be considerably stronger. Don’t make your website’s security for granted.

Anycast DNS vs. Unicast DNS

The Unicast DNS functions in a different way. The DNS server data is kept at the physical location of the DNS server, contrary to the Anycast DNS. So, regardless of the user’s location, all devices that want to display your site will check this server. As a result, if your server is in Asia and the user is in Germany, the response latency will be increased. Similarly, if your DNS server goes down or is hacked, the website would be inaccessible unless you have a backup plan in place. In contrast, if you use Anycast DNS, this will not happen since if the nearest server is down, you will be forwarded to the next closest server.

Get familiar with DDoS Protected DNS service


You may now confidently assert that you understand the primary function of the Anycast DNS. It’s a single IP address shared across multiple servers. It improves DNS resolution performance and is simple to use.

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