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完整域名

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完整域名的树状图

完全合格域名(英语:Fully qualified domain name),缩写为FQDN,又译为完全资格域名完整领域名称,又称为绝对领域名称(英语:absolute domain name)、 绝对域名[1],是域名的一种,能指定其在域名系统(DNS)树状图下的一个确实位置。一个完全资格域名会包含所有域名级别,包括顶级域名和根域名。完整域名这个名称的由来,是因为它没有模糊空间,只能用一种方式来解析。完整域名是因应互联网上需要一个统一识别方式而出现,在1980年代后期快速成长。

完整域名由主机名称与母域名两部分所组成,例如有一部服务器的本地主机名为myhost,而其母域名为example.com.,那指向该服务器的完整域名就是myhost.example.com.。虽然世界上可能有很多服务器的本地主机名是myhost,但myhost.example.com.是唯一的,因此完整域名能识别该特定服务器。

注释

  1. ^ RFC 1035, Domain names: implementation and specification

外部链接

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完整域名
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