We will show you everything you need to know about Anycast DNS. A complete breakdown of Anycast DNS that will explain to you the functionality and purpose of this service.
What is Anycast?
Anycast is a routing scheme that is perfect for use with DNS. You can use the same IP address (Anycast address) on multiple nodes. It is more about the configuration of routers and routing than servers.
Each packet sent to an Anycast IP address may reach a different server in an Anycast DNS scenario. The anycast address is shared or configured in multiple different servers across the network.
They are routed to the IP address with the best network metric. This is the nearest server in most cases, but it is not a must. The metrics could be various factors like bandwidth, cost, load, or reliability, etc.