What is dns

When you want to access a web page on the Internet you need the IP address of the server where it is stored, but, as a rule, the user only knows the domain name. The reason is none other than the difficulty of remembering the numerical series of the type that compose them, which are precisely those that are the basis of communication on the Internet. It is for this reason that IP addresses are “translated” into names that we can remember, the so-called domains:

The Domain Name System or DNS is a hierarchical naming system that deals with the administration of the domain name space (Domain Name Space). Its primary task is to resolve naming requests. This function could be explained by comparing it to a telephone information service that has current contact details and provides them when someone requests them. To do this, the domain name system relies on a global network of DNS servers, which subdivide the name space into zones that are managed independently of each other. This allows for decentralized management of domain information.

What is a domain zone?

A DNS zone is a part of the DNS namespace that is managed by a specific organization or administrator. The DNS zone is an administrative space that allows more granular control of DNS components, such as authoritative name servers.

What is a domain and what is its structure?

The structure of a domain

An FDQN indicates the exact position of the target computer in the Domain Name System tree structure and is composed of two parts: the host name (Host Name) and the domain name. The following example shows the FQDN of a fictitious mail server: mailserver.example.com.

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What is a domain name server?

A DNS server, also known as a name server, is server software that calls upon a DNS database to respond to requests that relate to the domain name space.

Zones in dns

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The DNS zone of a domain is a configuration file composed of records. These records serve as a link between the domain and the servers that host Internet services, such as websites (via the A record) or email addresses (MX record).

Editing a DNS zone is a delicate operation. An erroneous modification could, for example, disable access to the website or the reception of new messages at email addresses.

Knowing the different types of records will allow you to better understand the changes you need to make when editing the domain’s DNS zone. Please refer to the following list. It contains the purposes and particularities of each record.

What is a DNS and examples?

The DNS, or domain name system, translates human-readable domain names (e.g., www.amazon.com) to machine-readable IP addresses (e.g.,

What is a domain in mathematics?

The domain of a function f ( x ) is the set of all values for which the function is defined, and the range of the function is the set of all values that f takes.

How to configure the DNS server?

The DNS configuration process depends on the company where you have your domain but it is quite similar in all of them. First, you must access the control panel and go to the domain list. Then click on the domain you want to modify and look for the term “DNS management” or “DNS servers”.

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The Domain Name System (DNS) is a worldwide hierarchical system that manages the data associated with Internet domains. A domain is a name that people can easily read, remember and use. One of the main tasks of the DNS is name resolution, i.e. mapping domain names to IP addresses. The DNS is therefore a fundamental pillar in the technical structure of the Internet. Below you can see an example of name resolution:

Whether it is annoying advertising or malicious malware mails, a powerful defense system against spam is indispensable. This is why email clients such as Outlook use DNS-based Blackhole Lists (DNSBL) to block spammers. Find out what DNSBL services are all about.

Are you concerned about maintaining your privacy and therefore use a VPN when surfing the Internet? Good! But are you aware of what can go wrong? We show you the dangers of DNS leaks and explain how to protect yourself against them. We also explain the interesting functionality of DNS leak testing.

How to configure DNS?

To do this, go to System Preferences and click on Network. Then, choose the connection you are using in the side panel and click on Advanced… Now, click on the DNS tab and modify the IP addresses of the DNS server in the DNS Servers panel.

Where is DNS applied?

DNS stands for Domain Name System and is a technology based on a database used to resolve names in networks, that is, to know the IP address of the machine where the domain we want to access is hosted.

What is DHCP examples?

Dynamic Host Configuration Protocol (DHCP) is a client/server protocol that automatically provides an Internet Protocol (IP) host with its IP address and other related configuration information, such as subnet mask and default gateway.

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The Domain Name System (DNS)[1] is a decentralized hierarchical naming system for devices connected to IP networks such as the Internet or a private network. This system associates various information with domain names assigned to each of the participants. Its most important function is to “translate” human-intelligible names into binary identifiers associated with the devices connected to the network, in order to locate and address these devices globally.[2] The system is also used to “translate” the names of the devices connected to the network into binary identifiers.

The DNS server uses a distributed, hierarchical database that stores information associated with domain names on networks such as the Internet. Although as a database DNS is capable of associating different types of information with each name, the most common uses are the mapping of domain names to IP addresses and the location of email servers for each domain.

Primarily, DNS was born out of the need to easily remember the names of all servers connected to the Internet. Initially, SRI (now SRI International) hosted a file called HOSTS that contained all known domain names.

By Rachel Robison

Rachel Robison is a blogger who collects information on court filings and notices.