What is DNS and what is it for?

For folks that work on the net and with secure websites repeatedly it's become common to listen to concerning the DNS, or DNS servers. however maybe as most do, ar doing} not have a {lot of|abundant} plan of ​​what it's concerning. nowadays from Tecnomagazine ar going to} justify what the DNS is and the way it works.

For some folks, DNS United States of America country|North yank nation}ually|is typically|is sometimes} associated solely with the DNS addresses given to USA by our web supplier, or Google DNS eight.8.8.8 and 8.8.4.4, which permit {us|United States|United States of America|America|US|U.S.|USA|U.S.A.|North yank country|North yank nation} to simply resolve any name.

However, the DNS goes a bent to|we tend to}ll way side} those entries that we have a tendency to enter into our router after we install the net ANd perform AN ADSL or Fiber a glance at}.

What is DNS?

DNS stands for name System, that in Spanish may be translated virtually as a "domain name system", is nothing quite a info with records within that serves and is actively accustomed resolve hosts (names) to IP addresses. That is, it's sort of a guide that enables after you kind "tecnomagazine.net" in your browser, the browser will notice wherever it's staying, and request the content of the page.

If a bent to|we tend to} use an area network, with IPs like 192.168.1.1, 192.168.1.101, and 2 or 3 heap of} IPs, basic {cognitive process} them planning to be|are} extraordinarily straightforward. however imagine basic {cognitive process} each IP of the net, there's no one World Health Organization will roll {in the hay|love|make out|make love|sleep with|get laid|have sex|know|be intimate|have intercourse|have it away|have it off|screw|fuck|jazz|eff|hump|lie with|bed|have a go at it|bang|get it on|bonk|copulate|mate|pair|couple}, which is why DNS exists, to guide the computers and users to {seek out|to search out} the content they need victimisation names, that ar easier to recollect than the IPs .

1. DNS Server: they're those World Health Organization store and method records of every name that's requested by DNS shoppers.
2. DNS Client: Any laptop, transportable or table that desires to navigate a website mechanically becomes a DNS shopper because it makes requests to the DNS servers.
3. Authoritative Zones: These ar organized teams of servers that specialise in serving to to resolve domain names, such as .org.com.mx .es, etc.

How DNS works

Solving a website name means that discovering wherever your content is hosted, as straightforward as that. The DNS resolution uses dns servers + authoritative zones or authority zones to resolve the various domains, once it fails attempt to to|to attempt to do} therefore, it's derived to different DNS servers that have already got the DNS cache, that is named a structure of DNS tree.

What is the DNS server and what will it do?

Let's currently see a technical example of however a DNS request is formed with our domain: tecnostuffs.com

1. We open our laptop and a tab in our browser.
2. We type: "tecnomagazine.net"
3. The OS a bent to|we tend to} use (Windows, operational system} or Mac) can check if there's already a cache created on the positioning wherever the page is hosted (web server), if you have got it, go straight thereto and show you the page. If you are doing not notice any references, raise the DNS servers organized in our router or those created by the DHCP configuration.
4. Then the domestically organized DNS server suppose that it doesn't have that data either (the IP of that domain), then it'll raise you to raise an equivalent question to the external DNS servers responsible of that authoritative zone .net
5. This server can set the domain tecnomagazine.net and what IP is appointed, and can reply to the DNS server hold on in your router, which can build your browser understand wherever to provoke the knowledge.
6. What happens if a web site changes its IP?
7. This is one thing that happens and lots after we migrate our page from one net hosting supplier to a different the IP changes, and DNS servers take it slow to grasp concerning this transformation, which might take up to seventy two hours to unfold throughout the length and breadth of the between all DNS servers and ISPs in every country.

One way to simply verify however DNS servers ar breakdown the new IP of the web site is by victimisation tools like DNS Propagation, which permit you to grasp the precise IP of the web site in several elements of the planet from everywhere the planet.

Conclusion
The DNS request method is extraordinarily complicated, here we've summarized it in order that each technicians and non-technicians may know it within the best method, however indeed it's the method the DNS works and as you'll have seen, it's conjointly the center of web, as a result of while not the DNS you may not see any web site nowadays.

With the expansion that has had web, wherever thousands of domain names ar registered each day, it might be virtually not possible to not use the DNS or name system, in order that it is a guide for all DNS requests we have a tendency to build on a routine.

This video, if it had been not clear, exemplifies it well going the ideas summarized in AN interactive which will certainly like: