1.

The protocols working in the physical layer of the OSI Model are ___.

A. USB, Bluetooth, IEEE 802.3, IEEE 802.11, IEEE 802.15, IEEE 802.16
B. POTS, PDH, SONET, SDH, PON, OTN, DSL, ITU-T V series, ITU-T G.hn PHY
C. I.430, I.431, EIA/TIA-232, EIA/TIA-449
D. All the above
Answer» E.


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