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Translations:Domain Name System/4/zh

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網際網路中的協調由一個複雜的授權根系統,即頂級域TLD),以及DNS和其他負責託管單個域信息的小型名稱伺服器進行維護。對於每個域而言,DNS都通過映射域名並將之指定給IP位址來分擔責任,反之亦然。這是通過已經指定給每個域的授權名稱伺服器來完成的。每個授權名稱伺服器負責其自身的特定域,但是它有權將新的授權名稱伺服器分配給它的子域。DNS能夠存儲各種類型的信息,甚至是某個特定域的電子郵件伺服器列表。DNS作為能夠確保網際網路功能正常的核心元素,它的作用是通過其基於關鍵字的分布式重定向服務來實現的。