DNS 的作用是 __ @font-face { font-family: 宋体; }@font-face { font-family: 宋体; }@font-face { font-family: "@宋体"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0cm 0cm 0.0001pt; text-align: justify; font-size: 10.5pt; font-family: "Times New Roman", "serif"; }.MsoChpDefault { font-size: 10pt; }div.WordSection1 { } A. 为客户机分配 IP 地址 @font-face { font-family: 宋体; }@font-face { font-family: 宋体; }@font-face { font-family: "@宋体"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0cm 0cm 0.0001pt; text-align: justify; font-size: 10.5pt; font-family: "Times New Roman", "serif"; }.MsoChpDefault { font-size: 10pt; }div.WordSection1 { } B. 访问 HTTP 的应用程序 @font-face { font-family: 宋体; }@font-face { font-family: 宋体; }@font-face { font-family: "@宋体"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0cm 0cm 0.0001pt; text-align: justify; font-size: 10.5pt; font-family: "Times New Roman", "serif"; }.MsoChpDefault { font-size: 10pt; }div.WordSection1 { } C. 将域名翻译为 IP 地址 @font-face { font-family: 宋体; }@font-face { font-family: 宋体; }@font-face { font-family: "@宋体"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0cm 0cm 0.0001pt; text-align: justify; font-size: 10.5pt; font-family: "Times New Roman", "serif"; }.MsoChpDefault { font-size: 10pt; }div.WordSection1 { } D. 将 MAC 地址翻译为 IP 地址 @font-face { font-family: 宋体; }@font-face { font-family: 宋体; }@font-face { font-family: "@宋体"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0cm 0cm 0.0001pt; text-align: justify; font-size: 10.5pt; font-family: "Times New Roman", "serif"; }.MsoChpDefault { font-size: 10pt; }div.WordSection1 { }