In DNS hierarchy, which term describes the second-level domain such as 'example' in 'example.com'?

In DNS hierarchy, which term describes the second-level domain such as 'example' in 'example.com'?

• A. Root
• B. Subdomain
• C. Second Level Domain
• D. Top-Level Domain

Answer: (C)

In DNS, names are organized in a hierarchy with the root at the very top, then top-level domains like com, org, or net, and beneath those are second-level domains—the part used to identify a specific site within that TLD. In example.com, the portion example is the second-level domain because it sits directly to the left of the top-level domain com and identifies the particular registered name within the com space. If you add another label to the left, like www.example.com or mail.example.com, that becomes a subdomain of the second-level domain, not the SLD itself. So the second-level domain is the main identifier immediately before the TLD in a domain name.

In DNS, names are organized in a hierarchy with the root at the very top, then top-level domains like com, org, or net, and beneath those are second-level domains—the part used to identify a specific site within that TLD. In example.com, the portion example is the second-level domain because it sits directly to the left of the top-level domain com and identifies the particular registered name within the com space. If you add another label to the left, like www.example.com or mail.example.com, that becomes a subdomain of the second-level domain, not the SLD itself. So the second-level domain is the main identifier immediately before the TLD in a domain name.