Anycast DNS – Complete breakdown

What is Anycast DNS?

Anycast DNS is a form of communication or routing technology that allows you to send and receive data quickly. One IP address can be entered into several DNS servers around the world using this method. Any of them has the ability to react to the request. The goal is for the server that is nearest to the user in terms of distance to respond. This significantly speeds up the response time.

How does it work?

When a device connects to the Internet, its IP address is used to initiate contact with a server. A one-to-one communication model is the most basic sort of communication. This is fine, and DNS resolution may operate. Still, if only one server has the necessary data (A or AAAA record) to answer and it is located far away, some requests will have to travel large distances to reach it. The user will not receive the expected response if the server is offline. The question will go unanswered.

What are the advantages of implementing Anycast DNS?

There are many benefits to implementing Anycast DNS. Some of them are as follows:

  • Quickly DNS queries answers. There are considerably more DNS nameservers, which are well-distributed to critical places. That way, no matter where the request comes from, it will be handled more quickly. So, the more, the merrier.
  • It is simple to set up. You only configure one IP address, which you then share with the group of servers in your network.
  • The mechanism for load-balancing. Load balancing is a breeze using Anycast DNS. The traffic is distributed over your network of numerous servers, avoiding a single point of failure. Spikes are also successfully dealt with.
  • Protection. It’s worth mentioning that Anycast DNS can defend you against DDoS attacks. DNS flood is one sort of attack in which DNS resolvers are the primary target. The purpose is to flood the DNS resolver with a massive volume of traffic in the form of DNS queries.

Routing methods types

Anycast is a type of routing method. But there are other very important methods as well, which are:

  • Unicast is a one-to-one communication system. This is the most fundamental technique in which all traffic is sent to a single site.
  • Broadcast is a term that most people are familiar with from television and radio. The data is transferred from one point to all in this system.
  • Multicast is one-to-many as well, though not to everyone. The traffic is only of importance to a small group. So, this type is helpful if there are no local nameservers.


Anycast DNS, in general, is a method of keeping traffic local. You direct it to the nearest instance, ensuring that your clients receive quick and dependable service. It’s very simple to set up and will help you increase your computer networking.

Leave a Reply

Your email address will not be published. Required fields are marked *