Security solutions based on physical infrastructure, and policy expressed in terms of a particular device, the corporate PC, an IP address, network port, or application protocol are becoming useless in a mobile, borderless world.

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In this case, the cyber identity of this file would be a full set of its cyber coordinates in the IP subspace: the computer IP address, its MAC address, a Port number associated with the particular application, and the file name would constitute the full set of cyber coordinates, singularly identifying a cyber object (our file) in cyberspace.

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The printer was at IP address 192.168.1.103, but the port definition was for 192.168.1.102.

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