Domain Name System (DNS) is an engine for Internet operability. It is scalable and distributed mechanism responsible for resolving user friendly names (e.g. xyz.co.tz) into computer friendly (IP) addresses (196.126.162.1) and vice versa. A Domain Name is made up of several levels of domains. In the Domain Name <xyz.co.tz> the <.tz> is called the top or first level domain, the <.co> is the second level domain and <xyz> is the third level domain.
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