替代DNS根
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替代DNS根是独立于官方[[icann|ICANN]]管理的DNS根区运营的命名空间系统，引入了标准互联网中不可见的额外[[tld|TLD]]或完全并行的层级结构。用户必须明确将[[dns-resolver|DNS解析器]]配置为查询替代根的权威服务器才能解析这些名称。由于替代根TLD不被ICANN认可，可能与未来的ICANN委托冲突，且在没有自定义配置的情况下普通用户不可见。主要项目包括[[opennic|OpenNIC]]、[[handshake-protocol|Handshake]]以及历史上的AlterNIC和ORSC。
示例
A user adds OpenNIC's resolver to their network settings and can suddenly access sites under .geek, .free, and .parody domains that are completely invisible to anyone using standard ICANN DNS.