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2025-03-31 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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What is the third-level domain name? Many novices are not very clear about this. In order to help you solve this problem, the following editor will explain it in detail. People with this need can come and learn. I hope you can gain something.
What is a third-level domain name? A third-level domain name is a domain name shaped like "a.www.yisu.com" and can be regarded as a subdomain name of a second-level domain name, characterized by that the domain name contains three "."
A complete domain name (.com, .net, .cn, .top, etc.) consists of two or more parts, with an English full stop between them. To separate the last "." The part on the right is called the top-level domain name (TLD,) top-level domain name "." The left part of the is called the first-level domain name, the first-level domain name. The left part of the second-level domain name is called the second-level domain name (SLD), and the left part of the second-level domain name is called the third-level domain name, and so on, each level of the domain name controls the allocation of its lower-level domain name.
In the form of "www.yisu.com/cloud/", take the form of a directory and replace "/" with "/". " Can not be called a third-level domain name, or even a domain name, generally referred to as the "second-level directory" under the domain name.
For example, "www.yisu.com" is a second-level domain name.
In addition, such as ".com.cn, .net.cn", register a domain name "example.com.cn", when "name.example.com.cn" is a second-level domain name, not a third-level domain name. Because .com.cn is a domain name suffix, commonly referred to as a secondary domain.
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