The DNS (Domain Name Server) system is a crucial system for running the internet, which however is a mystery unknown to many. Without DNS`s would not work the domain names that we use every day, really that way would not work any, but why.
Each computer connected to any network, particularly the Internet has a unique "logical" address, something like a telephone number, which we call IP address, IP addresses currently used (version 4) consists of four sections numeric separated by a dot, a typical IP address would look like this: 101.100.134.79 this is just an example.
Since it is very difficult to memorize hundreds of numerical addresses (as many pages as we visit daily), for that we created the network system that we now know as the internet or more appropriately as World Wide Web invented a method of "translating" these numerical addresses to textual directions. For some reason, which is subject matter of another type of article, humans are much easier to learn names and words than numerical sequences, therefore made the appearance of domain names. On the internet we know today people know how to access www.google.com but not to 172.217.13.78 which is one of the IP addresses used by Google.
Why do the changes take place on the server?
Another very common situation is that when we change the address of a domain from one DNS server to another, our provider tells us that the "propagation" can take 24 to 72 hours (usually much less). What does this mean?
What happens is that in order not to overload the internet root servers and reduce traffic by querying DNS "translations" of domain names to IP addresses, the DNS system works in such a way that temporary records of certain popular translations are stored, for example: if you make a query to search www.nethostingtalk.com , the DNS system of our internet access provider will return the IP resulting from that query.
In order to do this translation we probably had to consult directly to an internet root server, however, if we re-search for that address (or someone in the same network or "neighborhood" searches for it) is temporarily stored on a DNS server of our internet access provider, which saves you having to go to search for that translation directly to the internet root servers.
Each computer connected to any network, particularly the Internet has a unique "logical" address, something like a telephone number, which we call IP address, IP addresses currently used (version 4) consists of four sections numeric separated by a dot, a typical IP address would look like this: 101.100.134.79 this is just an example.
Since it is very difficult to memorize hundreds of numerical addresses (as many pages as we visit daily), for that we created the network system that we now know as the internet or more appropriately as World Wide Web invented a method of "translating" these numerical addresses to textual directions. For some reason, which is subject matter of another type of article, humans are much easier to learn names and words than numerical sequences, therefore made the appearance of domain names. On the internet we know today people know how to access www.google.com but not to 172.217.13.78 which is one of the IP addresses used by Google.
Why do the changes take place on the server?
Another very common situation is that when we change the address of a domain from one DNS server to another, our provider tells us that the "propagation" can take 24 to 72 hours (usually much less). What does this mean?
What happens is that in order not to overload the internet root servers and reduce traffic by querying DNS "translations" of domain names to IP addresses, the DNS system works in such a way that temporary records of certain popular translations are stored, for example: if you make a query to search www.nethostingtalk.com , the DNS system of our internet access provider will return the IP resulting from that query.
In order to do this translation we probably had to consult directly to an internet root server, however, if we re-search for that address (or someone in the same network or "neighborhood" searches for it) is temporarily stored on a DNS server of our internet access provider, which saves you having to go to search for that translation directly to the internet root servers.