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The physical layer is the lowest layer in both the OSI and TCP/IP network models. The physical layer is the actual medium used for communications, such as copper wire, optical fiber, or radio waves.
"Examples of this layer include, but are not limited to, Wi-Fi (IEEE 802.11), Code Division Multiple Access (CDMA), Global System for Mobile Communications (GSM), etc."
- ↑ Technology Assessment: Cybersecurity for Critical Infrastructure Protection, at 144.
- ↑ The Smart Grid Collaborative Report to the Michigan Public Service Commission (MPSC), at 108.
See also Edit