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13  下列有关域名系统的描述中错误的是 ( )

多选题
2021-09-03 17:24
A、域名系统的英文简称为DNS
B、域名系统的作用是实现域名与IP地址之间的相互解析
C、域名中最左端的域称为顶级域
D、cn是常用的顶级域名
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正确答案
B@#@C

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