udp tcp 委派 端口 世界 album pac nbsp p地址

前言：DNS，耳熟能詳的東西，內容太多，小編也不太好講清，只能寫幾個實驗詳解，供大家參考。 一、簡單介紹 1、DNS：通過主機名，最終得到該主機名對應的IP地址的過程叫做域名解析（或主機名解析）。 端口號：53/udp, 53/tcp 2、等級 根域 ：世界有13個ip地址管理，有10個在美國，1個

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DNS—正、反向解析；委派；主從；子域；轉發；智能dns等的實現