A Level 1 domain name can be bound to several Level 2 domain names, please 3Q

The general service provider only supports 50 secondary domain name resolution, you want to get a second-level domain name for your own station, I guess you want to ask how to bind the second-level domain name, and use the second-level domain name to access your own **. It is not a top-level domain bound to a second-level domain name, but a space bound to a second-level domain name. If you have any questions, please feel free to contact me!

My mailbox.

It depends on how many of your domain name providers give you: We here provide 10 second-level domain names for Wanwang and 20 second-level domains for Xinnet.

If the domain name supports universal resolution, you can have unlimited second-level domain names, but the general domain name provider only supports 20 resolutions, and you will be charged if you exceed it.

20 Level 2 domains for one top-level domain.

A top-level domain extension, usually .com、.net、.org、.com. cn、.cn and so on.

Top-level domains (or top-level domains; English: top-level domain; The English abbreviation: TLD) is the highest level of the Internet's DNS hierarchy, and it is stored in the namespace of the DNS root zone.

The top-level domain is the last part of the domain name, which is the letter after the last point of the domain name, for example, in this domain, the top-level domain is .com (or ..)com), the case is considered the same (encyclopedia).

Various domain extensions have different meanings. For examplecom means commercial companies company, net means network, .,

org means organization.

There are also country-specific domains. For examplecn is the country domain name of China; For example, fuyeor cn can indicate that this ** is from China and is registered in China.

A domain name like fuyeor com is called a "first-level domain".

A domain name like fuyeor com cn is also called a "first-level domain name" because com cn is a domain extension.

Second-level domain names are also called subdomains.

For example, the prefix for "docs fuyeor com" is "docs"; The www fuyeor com prefix is "www".

The first-level domain name is also known as the top-level domain name, and it should be noted that this form of domain name is not a first-level domain name, but only a second-level domain name, which means that www is just a hostname.

A true first-level domain name is made up of a legal string domain extension. Therefore, this form of domain name is a first-level domain name. IISP is the body of the domain name

com is a domain extension. It can be. .net domain extension, it can also be.

hu domain extension, etc.

The so-called second-level domain name is actually a hostname under a first-level domain name. As the name suggests, a string is added to the front of the top-level domain name, for example, it can have the same functionality as the root top-level domain. And by setting it up, it can have exactly the same functionality as the root top-level domain.

But this is not to say that there is no difference between a first-level domain name and a second-level domain name.

First-level and second-level domain names are two common domain name structures on the Internet, and the differences between them are as follows:1First-level domain name:

A top-level domain name is the highest-level domain name in the Internet's Domain Name System (DNS) and usually consists of a top-level domain name (TLD) and a country domain extension. For examplecom、.

net、.org、.cn、.

JP etc. Top-level domains are managed and assigned by domain name registries, and they typically represent different organizations, companies, or countries. 2.

Second-level domain name: The second-level domain name is a subdomain name under the bridge first-level domain name, which usually represents a specific **, application, or other resource. For example, under this first-level domain name, there can be multiple second-level domain names, such as etc.

In conclusion, first-level domain names and second-level domain names are two common domain name structures in the Internet, and the difference between them is that first-level domain names are domain names with the highest level of vulnerability, while second-level domain names are subdomains under first-level domain names.