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This article mainly explains "what does dns refer to in linux". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is dns in linux".

Dns in linux means domain name system and consists of a parser and a domain name server. Dns is a service based on tcp and udp protocols, which is used for daily domain name resolution and can be translated between domain names and ip addresses. A domain name server is a server that holds the domain names and IP addresses of all hosts in the network, and can convert domain names into IP addresses.

The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is dns in linux

What is DNS?

DNS is an acronym for Domain name system (Domain Name System), which consists of a parser and a domain name server.

A domain name server is a server that stores the domain names and corresponding IP addresses of all hosts in the network, and has the function of translating domain names into IP addresses.

The domain name must correspond to an IP address, and the IP address does not necessarily have a domain name. The domain name system uses a hierarchical structure similar to a directory tree.

The domain name server is the server side in the client / server mode, and it has two main forms: the master server and the forwarding server.

The process of mapping a domain name to an IP address is called domain name resolution. On Internet, the domain name and IP address are one-to-one (or many-to-one). Although the domain name is easy for people to remember, the machines can only know the IP address each other. The translation between them is called domain name resolution. Domain name resolution needs to be done by a special domain name resolution server. DNS is the server for domain name resolution.

DNS naming is used in TCP/IP networks such as Internet to find computers and services through user-friendly names.

When a user enters a DNS name in the application, the DNS service can resolve the name to other information related to it, such as the IP address. Because, when you are on the Internet, the URL you enter is to find the corresponding IP address through the domain name resolution system, so that you can surf the Internet. In fact, the final point of the domain name is IP.

Usually we use the forward resolution function of the DNS server, while DNS also has the direction resolution function, which is to resolve the IP address to the host name.

DNS is a service based on tcp and udp protocols, which is used for our daily domain name resolution and helps us translate between domain names and ip addresses.

DNS authorization management mechanism:

The maximum domain is the root domain, using. Indicates that next comes the first-level domain, that is, the top-level domain. Note: root and top-level domains are special and cannot be specified by individuals.

Then there are secondary domains, tertiary domains, etc., until the last host (these can be used by companies, organizations, and individuals)

Thank you for your reading, the above is the content of "what does dns refer to in linux". After the study of this article, I believe you have a deeper understanding of what dns refers to in linux, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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