Keep in mind: Above I am describing IPV4 and also not IPv6
So exactly what does DNS do? - Everytime you key in a LINK into your internet browser your computer system needs to lookup the ip address of the Domain Name, it does this by doing a DNS lookup. Your computer will certainly query its key DNS web server for the ip address (You could check your key dns server by going into command timely and also typing ipconfig/ all).
Until now so excellent right?
Well a fundamental DNS inquiry will generally be a host device (you as an example) asking your primary DNS server for the ip address of google.com, the DNS server will certainly after that have the outcome and also return it your machine, your machine currently understands where Google is, or a minimum of its ip address which is the info it has to be able to connect with it.
The hierarchy of DNS - Regrettably not every DNS web server has every result, a complete DNS database is enormous, simply think about how many millions and countless sites there are available! This is why there are a number of web links in the chain for DNS. On top of the chain are exactly what are called Origin Servers, these hold all the answers, they dnssec-failed know each Domain Name that is around the world obtainable. Nonetheless your computer will not query these, instead if your main DNS web server does unknown the response it will then ask its following web server in the chain, this is typically an ISP DNS web server. If this server does unknown the answer after that it will ask the following one in the chain, this will maintain occurring up until a Root Web server is quized which will constantly have the response.
To speed points up a little bit most DNS servers will hold a cache or a short-term shop of DNS documents, these generally last around 24 hours yet they will certainly save the root servers being continuously quized if the DNS web server prior to already understands the answer.
So there you have it, a basic intro to DNS, as I stated before it is undoubtedly a huge topic and we have actually only simply scratched the surface area here, however you currently recognize just what DNS does and also why it is so important.
For even more guides as well as articles on every little thing computer system relevant, come have a look at Stan The Computer System Man.
You could likewise like to review my relevant short article on how dns works.
Until now so excellent right?
Well a fundamental DNS inquiry will generally be a host device (you as an example) asking your primary DNS server for the ip address of google.com, the DNS server will certainly after that have the outcome and also return it your machine, your machine currently understands where Google is, or a minimum of its ip address which is the info it has to be able to connect with it.
The hierarchy of DNS - Regrettably not every DNS web server has every result, a complete DNS database is enormous, simply think about how many millions and countless sites there are available! This is why there are a number of web links in the chain for DNS. On top of the chain are exactly what are called Origin Servers, these hold all the answers, they dnssec-failed know each Domain Name that is around the world obtainable. Nonetheless your computer will not query these, instead if your main DNS web server does unknown the response it will then ask its following web server in the chain, this is typically an ISP DNS web server. If this server does unknown the answer after that it will ask the following one in the chain, this will maintain occurring up until a Root Web server is quized which will constantly have the response.
To speed points up a little bit most DNS servers will hold a cache or a short-term shop of DNS documents, these generally last around 24 hours yet they will certainly save the root servers being continuously quized if the DNS web server prior to already understands the answer.
So there you have it, a basic intro to DNS, as I stated before it is undoubtedly a huge topic and we have actually only simply scratched the surface area here, however you currently recognize just what DNS does and also why it is so important.
For even more guides as well as articles on every little thing computer system relevant, come have a look at Stan The Computer System Man.
You could likewise like to review my relevant short article on how dns works.