It is a network of networks that consists of millions of private, public, academic, business, and government networks of local to global scope, linked by a broad array of electronic, wireless, and optical networking technologies. Online shopping has boomed both for major retail outlets and small artisans and traders. Only the overreaching definitions of the two principal name spaces in the Internet, the Internet Protocol address space and the Domain Name System , are directed by a maintainer organization, the Internet Corporation for Assigned Names and Numbers .
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