Which Is Not a Function of the Physical Layer

question 7

Multiple Choice

Which is not a function of the physical layer:

• A)transmission of bits.
• B)defining the rules by which one and zeroes are transmitted.
• C)providing error-free transmission of data.
• D)providing the physical connection between sender and receiver.
• E)specifying the type of connection and type of signals, waves or pulses that pass though it.

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Definitions:

Angiography

A medical imaging technique used to visualize the inside, or lumen, of blood vessels and organs of the body, with particular interest in the arteries, veins, and the heart chambers.

Aortogram

A radiographic image or angiogram of the aorta obtained after the injection of a contrast medium to visualize the aortic arch and its branching vessels.

Lymphangiogram

A diagnostic imaging test that uses a special dye to visualize the lymphatic system, including lymph nodes and vessels.

Cinematoradiography

A diagnostic technique combining radiography with motion picture techniques to study the movement of internal structures.