Which of the following descriptions about the domain name hierarchy is incorrect?

Question

Options

• ASecond-level domain names, such as "abc.example.com", are sub-domains of first-level domains.
• BTop-level domains are distinguished according to domain name suffixes. For example, ".com" is a
• CThe main domain name, such as "example.com", is a subdomain of the top-level domain,
• DThe root domain is "", which is the highest-level domain name and is usually omitted when used

• A
  77% (17)
• B
  5% (1)
• C
  5% (1)
• D
  14% (3)

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