题目内容
An Internet computer is identified by its IP address, but it is difficult to remember.
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You can “call”www.sina.com.cninstead of 202.112.8.2.
The label of the DNS address are case insensitive.
The final component of an address was intended to indicate the type of organization hosting the computer.
cn represents the People's Republic of China, uk represents the United Kingdom, and jp for Japan.
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