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Computer Networks
Physical Layer
Q
The physical layer provides __________
AA. Mechanical specifications of electrical connectors and cables
BB. Electrical specification of transmission line signal level
CC. Specification for ir over optical fiber
DD. All of the mentioned
Correct Answer:
D. D. All of the mentioned
Explanation:
Anything dealing with a network cable or the standards in use – including pins, connectors and the electric current used is dealt in the physical layer (Layer 1). Physical layer deals with bit to bit delivery of the data aided by the various transmission mediums.
