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What is DNS and how long the propagation takes

Sencuart

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You've found the perfect domain name for your site and you're ready to start your online business. You just registered a domain but when you insert it into the browser you find it is not working. For a domain to work, you need a hosting service and set up DNS. Propagation of a domain, that is to say, DNS, takes some time, between 24 and 48 hours, but there are situations where propagation is made even faster in just a few hours. This works for a reason.

What is the propagation of a domain
Propagation of a domain, often called DNS propagation, is the process of updating each web server with the new information. A number of servers require this update, and there is a required time from the time of change until all servers have retrieved the new information.

How DNS Servers work
DNS servers have the role of translating Ip addresses into web domains. In fact, although users are searching for a website by web domain name, there is an IP address in the back, a number sequence that is harder to memorize and which looks like 123.456.789.101.

Thus, each time you access a web domain, a DNS server takes the domain name and processes the IP. It is a process that works very quickly, so the user will not feel this process. The only situation when the DNS process will be felt is when it changes with new ones.

What happens during a DNS change process
When you change your hosting provider, each DNS server in the world must record that information before delivering content when the domain is accessed. The difference is that each server will receive updated information at different times, so propagation may be faster in some locations than in other locations.

Because DNS changes are relatively rare, most servers have stored the information that was previously collected. For example, if someone searched your domain last week and the DNS server has managed to translate the domain to a specific IP address, then the server will try to default to the same IP. Finding that a DNS change occurred, you need to identify the new location of the new IP set.

The DNS propagation time factors are: TTL settings (the length of time that DNS servers store the information), ISP (Internet Service Provider), and Domain Name Registry.

It can be confusing, but it's just a temporary situation. Shortly, all servers will have updated the new Ip set. It is also worth mentioning that web browsers often store information in a cache. Thus, even after a DNS update, you may be able to view all of the old site content, which is why you'll need to clear the cache for upgraded site display.

When DNS propagation is complete
It is not possible to accurately determine when the DNS propagation is complete, because a location may be complete, while another location is still being processed. Usually, it can take between 24-48 hours from all locations.
 

Stewart

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#2
Very cool information, Sencuart!

Look and some reasons why you need to use DNS servers:

1. Faster internet browsing
DNS servers offered by companies such as Google, OpenDNS, or Norton may be faster than those maintained by your local internet distributor. In this case, the use of third-party DNS servers may mean a faster internet browsing experience.

2. Better security
If you use such a DNS server, then you will add an extra level of protection between you and malware on the web.

3. Faster DNS database updates
Large public DNS, such as Google or OpenDNS, have the good habit of refreshing their IP-based database faster than DNS servers maintained by most Internet vendors. As a result, if you work with sites that you can not access because they have changed their IP address and your DNS has not refreshed your database, then using another public DNS service can help.

So, there are many situations where public DNS servers can be a better choice than those offered by your Internet vendor.
 
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