A CDE Definition
(Top-Level Domain) The highest-level in the Internet domain naming system. Officially called a "generic top-level domain" (gTLD), it is also known as a "domain suffix" or "domain extension," because the designation is added to the end of the domain name. For example, .com is the gTLD in www.lenovo.com. For details, see Internet domain name.
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Click any of the following categories for a list of fundamental terms.