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This article mainly introduces the knowledge related to the domain name, which is detailed and easy to understand, simple and quick to operate, and has a certain reference value. I believe you will gain something after reading this domain name-related knowledge point. let's take a look.

Top-level domain, second-level domain and tertiary domain

The Internet Corporation for assigned names and numbers (icann) is responsible for managing and coordinating the Internet domain name system. According to the definition of icann, a complete domain name has at least two parts, each with "." Separated, the right side of the last part is called the top-level domain name, and the left side of the last part is called two. Domain name, the left part of the second-level domain name is called the third-level domain name, and so on, each first-level domain name controls the distribution of the lower-level domain name.

Top-level domain

In the Internet domain name system, the classification of top-level domain names includes:

Country code top-level domain (cctld): corresponds to the geographical location of the country and region, such as .cn /. China represents China, the United States represents the United States, and so on.

Generic top-level domain (gtld): corresponds to different categories, such as .com, .net, .org, etc.

New generic top-level domain name (new gtld): also known as the new top-level domain name, the new top-level domain name suffix is the first batch of new top-level domain names after the traditional domain name suffix resources are exhausted. Icann was approved in 2012 and opened to global registration in 2014.

Domain name resolution and domain name server

Domain name system (DNS) is the intentional core service of the Internet. as a distributed database that can map domain names and IP addresses to each other, it is a system for translating domain names and IP addresses corresponding to advances. The machine that hits the domain name system becomes the known domain name server.

Auxiliary domain

Is a domain name under the top-level domain. We usually find two "." in the secondary domain name. Numbers, such as ".gov.cn", ".org.cn", and so on. The directory format "itcast.cn/web/" is not a secondary domain name, but a subpage.

Third-level domain name

The third-level domain name is the domain name under the second-level domain name, and the second-level domain name is added to the left content, such as "web.icast.cn". A third-level domain name can be used as a subdomain name of a secondary domain name.

This is the end of this article on "what are the knowledge points related to domain names?" Thank you for your reading! I believe you all have a certain understanding of "what are the knowledge points related to the domain name". If you still want to learn more knowledge, you are welcome to follow the industry information channel.

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