The United States Department of Defense considers cyberspace, often referred to as the cyber domain, as made up of three layers: 

• The physical-network layer includes the physical network and the geographic component.
• The logical-network layer includes the code itself.
• The cyber-persona layer includes the individual and the cyber identity as well as where the network resides and its hardware, systems software, and infrastructure.

 How do you exist in cyberspace? Consider your cyber persona such as social media and online activity and how you connect to the layers in the cyber domain. Who do you know that does not have a cyber persona? Can you think of a time when you didn't interact with cyberspace?

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Existing in cyberspace involves creating and maintaining a cyber persona that interacts with the various layers of the cyber domain Heres a breakdown ... View the full answer