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Essential DNS

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Essential of the DNS (Domain Name System)



1. The role of a DNS?

Your website is on a server identified by an IP address. To obtain the data on your site so your visitors must obtain this address. Now this is the domain name they know. The purpose of DNS is to translate the domain name into an IP address: the DNS resolution.

2. How does it work?

Your website is on a server identified by an IP address. To obtain the data on your site so your visitors must obtain this address. Now this is the domain name they know. The purpose of DNS is to translate the domain name into an IP address: the DNS resolution. As illustrated in the following scenario:
The browser then addressed directly to the server to retrieve the data on the page.

3. Potential Problems classic DNS

Usually your domain names registrations are located in one place: that which is physically installed the DNS server.

3.1. High latency:

If your visitors are far from this place, the return information needed for DNS resolution is longer, and therefore takes more time.


3.2. unavailability:

If the DNS server becomes unavailable, the domain conversion -> IP server is no longer assured. Your visitors can not access your site, and your rank on search engines suffers.


3.3. How DNS Anycast addresses these issues?

Anycast DNS automatically duplicates your domain name registration to the 4 corners of the world.

Your DNS records are now present in the world, closer to your potential visitors.

The IP Anycast then redirect your visitors to the DNS server that is physically closest to them. Although it is located in Tokyo, the user will see his query solved in record time.

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