The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Erik Gregersen. A domain name must be unique on the Internet and must be assigned by a registrar accredited by ICANN. The third level identifies a specific host server at the address, such as the “A domain name is ultimately mapped to an IP address, but two or more domain names can be mapped to the same IP address. The second level is the top level plus the name of the organization (e.g., “” for Encyclopædia Britannica). However, in 2011 the Internet Corporation for Assigned Names and Numbers ( ICANN) announced that it would greatly increase the number of top-level domains by allowing nearly any new top-level domain name in any language. The top level, called the top-level domain, has usually denoted the type of organization, such as “com” (for commercial sites) or “edu” (for educational sites). Domain names are typically in a three-level “” format. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!ĭomain name, address of a computer, organization, or other entity on the Internet.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. A memorable domain name for your business can make the difference between creating a successful web presence and.From tech to household and wellness products. This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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