physical layer provides: Options: A . &nbspmechanical specifications of electrical connectors and cables B . &nbspelectrical specification of transmission line signal level C . &nbspspecification for IR over optical fiber D . &nbspall of the mentioned

physical layer provides:

Question

physical layer provides:

Options:

A . mechanical specifications of electrical connectors and cables

B . electrical specification of transmission line signal level

C . specification for IR over optical fiber

D . all of the mentioned

Answer: Option D

None.

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