• Generic top-level domain(gTLD)
A generic top-level domain is among the most popular domain extensions, and they include .net,.com, .biz and .org. Any person can register for these domain name extensions. Together with the general domain name extensions, other ones are restricted for use only. These domain name extensions are restricted and are reserved for only the people who use them, and they include a specific group of people or an organization. They include, .edu which are used by schools and educational institutions and the. Xxx which are restricted for use only by the adult entertainment websites.