DNS区域
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DNS区域是[[dns|DNS]]命名空间的管理分区，由单个[[authoritative-dns|权威服务器]]或一组协作服务器管理。区域与域名并不相同：域名所有者可以通过[[dns-delegation|委派]]将其命名空间拆分为多个区域，或者单个区域也可以包含多个域名。每个区域由以必填[[soa-record|SOA记录]]开头的[[zone-file|区域文件]]描述，包含权威服务器负责应答的所有DNS记录。区域边界由指向子域名服务器的[[ns-record|NS记录]]委派来定义。
示例
example.com and staging.example.com may live in separate DNS zones — the parent zone for example.com contains an NS record delegating staging to its own authoritative server, creating an independent zone boundary.