DNS Server Change Propagation – Why You Need to Wait?

I see a page from the old server, and my neighbor already from the new one?

Let’s start from the beginning, what are DNS servers?

In order for a website to be visible on the Internet, there must be a server on which the website files are located. Such a server has a public IP address, thanks to which any device on the Internet can connect to it and download the page. However, the IP address does not look very good and is quite difficult to remember, for example: 91.211.222.16

Domain names were invented to make the internet a friendlier place. A domain is a friendly name, thanks to which we do not have to remember the IP address.

An example domain is: domena-klienta.pl

But how does the browser know with which server, i.e. with which IP address, it should connect to download the page?

Each domain should point to at least two DNSs (domain name servers), i.e. servers that convert the domain name to an IP address. For example, the hosting company Smarthost has three independent DNS servers of its own:

dns.smarthost.eu

dns2.smarthost.eu

dns3.smarthost.eu

DNS server addresses are provided in the domain registrar’s panel. They are recorded at the master recorder. In the case of domains ending in .pl, NASK is the main registrar.

If you have purchased a domain from Smarthost, our DNS is set by default. So just add the domain via cPanel → Additional domains so that our DNSs will assign the domain the correct IP address on our specific server where you will place your website.

You can check which DNSs a specific Polish domain has set through the NASK whois tool, available at: https://www.dns.pl/cgi-bin/whois.pl

How exactly does a web browser query DNS servers?

The path that the browser must take to find out what IP address is behind the friendly domain is shown in the diagram:

Michał
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