什么是主域、子域_什么是子域？
什么是主域、子域
Subdomain is a term used in the internet area in order to describe the children of a domain. A subdomain is a popular technology where domains can be extended with sub-sections. Subdomains provide different use cases and advantages.
Subdomain是Internet区域中用来描述Subdomain的术语。 子域是一种流行的技术，其中的域可以用子部分扩展。 子域提供了不同的用例和优势。
子域用例 (Subdomain Use Cases)
Subdomains provide different use cases and advantages. Below we will list some popular use cases of the subdomain.
子域提供了不同的用例和优势。 下面我们将列出子域的一些流行用例。
Staging Site: Subdomains are a good way to create testing or staging site in order to make some tests without creating different domains. This is useful where the domain SSL certificate can be used for subdomain too.
登台Staging Site ：子域是创建测试或登台站点的好方法，以便在不创建其他域的情况下进行某些测试。 当域SSL证书也可以用于子域时，这很有用。
Online eCommerce: eCommerce is another popular use case where the same domain will be used for different eCommerce applications. As the eCommerce applications are complex this will not hurt the website by using the same domain with different subdomains.
Online eCommerce ：电子商务是另一个流行的用例，其中相同的域将用于不同的电子商务应用程序。 由于电子商务应用程序很复杂，因此使用相同的域和不同的子域不会损害网站。
SEO: Domain authority is important for SEO and using the same domain with different subdomains and contents will make the domain more powerful and increase the authority score by summing its different subdomains.
SEO ：域权限对于SEO很重要，并且将相同的域与不同的子域和内容一起使用将使该域更强大，并通过求和不同的子域来增加权限得分。
Different Applications: A company may have a web site and different web applications. In order to make all of these to work together, subdomains are very useful in a single domain and brand for multiple web sites and web applications.
Different Applications ：公司可能有一个网站和不同的Web应用程序。 为了使所有这些功能协同工作，子域在单个域和多个网站和Web应用程序的品牌中非常有用。
Different Language: Even it is not so much popular domains can be used to provide different languages for the same website or application. Every language shortcode like “tr”, “de” can provide different languages for the same content.
Different Language ：即使不是那么多，流行的域名也可以用于为同一网站或应用程序提供不同的语言。 每种语言的短代码(例如“ tr”，“ de”)都可以为相同的内容提供不同的语言。
Mobile Page: Subdomains also used to create mobile versions of the given domain web site or web applications. generally the m subdomain name is used for a mobile subdomain like “m.poftut.com”.
Mobile Page ：子域也用于创建给定域网站或Web应用程序的移动版本。 通常， m子域名用于移动子域名，例如“ m.poftut.com”。
Multiple Web Sites: Even subdomains are used to create related web sites or web applications in some cases they can be used to create unrelated site creation for free. For example “wordpress.com” domain provides subdomains in order to create a WordPress website for free like “yourwebsite.wordpress.com”, “poftut.wordpress.com” etc.
Multiple Web Sites ：在某些情况下，甚至子域也可用于创建相关的网站或Web应用程序，它们可用于免费创建不相关的网站。 例如，“ wordpress.com”域提供了子域，以便免费创建WordPress网站，例如“ yourwebsite.wordpress.com”，“ poftut.wordpress.com”等。
子域示例(Subdomain Examples)
Subdomains are very simple to create. Below we will show some subdomain examples related to the domain. We will also list some popular some domain names of the subdomain part.
子域的创建非常简单。 下面我们将显示一些与该域相关的子域示例。 我们还将列出一些流行的子域部分域名。
poftut.com
test.poftut.com
app.poftut.com
tr.poftut.com
de.poftut.com
market.poftut.com
doc.poftut.com
wiki.poftut.com创建子域 (Creating Subdomain)
Subdomain creation is related to the domain where the domain provider is used to create a subdomain. In order to create a subdomain, the given domain should exist and own by us. Then the created domain should be related or bind with the domain.
子域的创建与使用域提供程序创建子域的域有关。 为了创建子域，给定的域应由我们存在并拥有。 然后，创建的域应与该域相关或绑定。
通配符子域 (Wildcard Subdomain)
Wildcard subdomain is a catch-all subdomain where all created subdomain will point and redirect to the same site which is generally the domain. Wildcard subdomains are expressed and represented with “*.poftut.com”. For example, WordPress multisite installation will use the wildcard subdomain in order to manage different subdomains like different domains.
Wildcard subdomain是一个包罗万象的子域，其中所有创建的子域都将指向并重定向到通常是该域的同一站点。 通配符子域用“ * .poftut.com”表示并表示。 例如，WordPress多站点安装将使用通配符子域来管理不同的子域，例如不同的域。
子域名费用 (Subdomain Fee)
Even subdomains can be used for different purposes, web sites, and web applications from the DNS point of view they are just children of the domain. Domains are registered for a fee and the usage of the domain name and subdomains are owned by the registering party. So there is no need to pay any subdomain fee for a single subdomain or multiple subdomains.
从DNS的角度来看，甚至子域也可以用于不同目的，网站和Web应用程序，它们只是该域的子级。 域名注册需要付费，域名和子域名的使用由注册方拥有。 因此，无需为单个子域或多个子域支付任何子域费用。
翻译自: https://www.poftut.com/what-is-subdomain/
什么是主域、子域