SIPRNet

Rarity: Common

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At a glance

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Place

Domain

Science and technology

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What Wikipedia says

The Secret Internet Protocol Router Network (SIPRNet) is "a system of interconnected computer networks used by the U.S. Department of Defense and the U.S. Department of State to transmit classified information (up to and including secret information) by packet switching over the 'completely secure' environment".

Excerpt from the Wikipedia article “SIPRNet”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Antonio O. Garza, Jr. U.S. Ambassador to Mexico, Public domain, via Wikimedia Commons.