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Which of the following descriptions about the domain name hierarchy is incorrect?
- A . Second-level domain names, such as "abc.example.com", are sub-domains of first-level domains. Usually, only one second-level domain name can be attached to a main domain.
B. Top-level domains are distinguished according to domain name suffixes. For example, ".com" is a general top-level domain, indicating that it is used for commercial purposes.
C. The main domain name, such as "example.com", is a subdomain of the top-level domain, corresponding to the first-level domain server
D. The root domain is "", which is the highest-level domain name and is usually omitted when used
Suggested Answer: A
Posted : 11/02/2023 10:41 pm