Behind its apparent simplicity, the Internet hides a complex architecture. At the center of this ecosystem is the domain name system (DNS), an essential system for organizing the network. In this context, DNS servers play a crucial role, comparable to that of a giant telephone directory: they translate domain names into numerical IP addresses that computers use to communicate with each other.
Imagine having to remember a long sequence of numbers to enter and get to the location you want. Almost impossible, right? relevance of DNS server it’s easy to say: they allow us to connect to web domains without the need to type the entire numerical sequence of IP addresses.
What are DNS?
The DNS – which we said is the acronym for domain name system – is a distributed and hierarchical system that allows the resolution of domain names into IP addresses. In simpler terms, when we type www.shellrent.com/ into our browser, a DNS server translates that name into a numerical address, which represents the actual “location” of the website on the Internet.
This translation is necessary because, although we easily remember names and words, computers communicate only through numbers. Without DNS, we would have to memorize long rows of numbers to access any online resource.
How does a DNS server work?
The implementation of DNS traverses the infrastructure that enables Internet browsing. Simply put, it can be compared, albeit inappropriately, to a type of telephone directory that allows you to look up or type in the name of the person you want to contact instead of their number.
Thanks to DNS you don’t need to remember the string of numbers: they take care of it resolve node or host names, that is, find the corresponding number and make the “call” for us.
But, basically, how does DNS work? Well, the DNS resolution process can be divided into 6 steps.
| Degree | Description |
|---|---|
| 1. Checking the local cache | The system checks if the IP address of the requested domain is already in the local cache of the device or browser, avoiding a new search. |
| 2. Request to the ricorsivo DNS server | If the information is not available locally, the browser sends a resolve request (recursive DNS request) to a recursive DNS server to find the IP address associated with the domain. |
| 3. Querying root servers | If the recursive server does not already have the answer, it queries the DNS root servers, which are the highest level of the DNS hierarchy. |
| 4. Contact TLD servers | Root servers direct the request to the appropriate Top Level Domain (TLD) server, for example .com, .it o .org. |
| 5. Communication with authoritative servers | The TLD server redirects the query to the authoritative DNS server of the particular domain, which holds the definitive information about its IP address. |
| 6. Answer and deposit | The authoritative server returns the requested IP address; The data is stored in the recursive server cache and sent to the user’s device to allow connection to the site. |
Which DNS servers are responsible for loading a web page?
As just mentioned, there are different servers that could be questioned in a system organized with a hierarchical structure. Let’s take a closer look at DNS servers.
DNS driver
The DNS server is what connects the user’s browser to other DNS servers. Its task is to receive user queries and, if the IP address is in the cache, connect them to the desired site.
In the event that the DNS resolver does not have the data requested by the browser, it transmits it to other DNS servers and, when received, returns it to the initial browser.
Root name server
Through the root servers, the data sent by the resolver is propagated until it reaches the source from which it can obtain the IP address of the domain the user searched for. It should be noted that the root, after receiving a request, acts to identify the top-level domain of the domain name, and directs the resolver towards the correct TLD server.
There are 13 types of root servers and they are under organizational control ICANN (Internet Corporation for Assigned Names and Numbers), the entity that manages the domains.
TLD name server
Not a TLD, or Top Level Domain, the data of domains grouped by their extensions are archived, for example .com, .it, .org. Therefore, these servers have the function of directing the requests received from the roots towards the authoritative (or authoritative) servers based on their TLD reference.
The Top Level Domains are managed byIANA (Internet Assigned Numbers Authority, a subsidiary of ICANN, and are divided into two main types:
- generic top-level domains, ie gTLD not related to a specific country, for example: .org, .com, .net;
- top-level domains that identify each country, i ccTLDfor example the domain .it, uk, .de.
An authoritative denominator
Nel server name authoritative, or authoritative, the endgame occurs in the DNS resolution process. In fact, it is precisely here that all the information regarding domain names is stored, as well as the necessary IP addresses, and it is the server that responds to the resolver by sending him the data that his query requests.
What types of DNS queries are there?
The question, three types can be processed during a DNS lookup:
- Question recursive, occurs when a DNS client asks a DNS server to provide the requested resource record or an error message if the resolver cannot find the record;
- Question iterative, used by the DNS client when seeking a more accurate response from a DNS server. If the latter is unable to provide a match for the request name, it will direct the client to an authoritative DNS server for a lower level in the domain namespace.
- Question not recurring, which often occurs when a DNS resolver client queries a record that it can access because it is authoritative for the record or because the same record is already in its cache.
DNS servers are the invisible backbone of the internet, a critical infrastructure that turns complex sequences of numbers into easy-to-remember domain names.
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PakarPBN
A Private Blog Network (PBN) is a collection of websites that are controlled by a single individual or organization and used primarily to build backlinks to a “money site” in order to influence its ranking in search engines such as Google. The core idea behind a PBN is based on the importance of backlinks in Google’s ranking algorithm. Since Google views backlinks as signals of authority and trust, some website owners attempt to artificially create these signals through a controlled network of sites.
In a typical PBN setup, the owner acquires expired or aged domains that already have existing authority, backlinks, and history. These domains are rebuilt with new content and hosted separately, often using different IP addresses, hosting providers, themes, and ownership details to make them appear unrelated. Within the content published on these sites, links are strategically placed that point to the main website the owner wants to rank higher. By doing this, the owner attempts to pass link equity (also known as “link juice”) from the PBN sites to the target website.
The purpose of a PBN is to give the impression that the target website is naturally earning links from multiple independent sources. If done effectively, this can temporarily improve keyword rankings, increase organic visibility, and drive more traffic from search results.
