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Computer Networks » Physical Layer

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Physical Layer	Physical Media
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The physical layer is concerned with ___________

A. Bit-by-bit delivery
B. Process to process delivery
C. Application to application delivery
D. Port to port delivery

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Which transmission media provides the highest transmission speed in a network?

A. Coaxial cable
B. Twisted pair cable
C. Optical fiber
D. Electrical cable

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Bits can be sent over guided and unguided media as analog signal by ___________

A. Digital modulation
B. Amplitude modulation
C. Frequency modulation
D. Phase modulation

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The portion of physical layer that interfaces with the media access control sublayer is called ___________

A. Physical signalling sublayer
B. Physical data sublayer
C. Physical address sublayer
D. Physical transport sublayer

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The physical layer provides __________

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

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In asynchronous serial communication the physical layer provides ___________

A. Start and stop signalling
B. Flow control
C. Both start & stop signalling and flow control
D. Only start signalling

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The physical layer is responsible for __________

A. Line coding
B. Channel coding
C. Modulation
D. All of the mentioned

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The physical layer translates logical communication requests from the ______ into hardware specific operations.

A. Data link layer
B. Network layer
C. Trasnport layer
D. Application layer

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A single channel is shared by multiple signals by ____________

A. Analog modulation
B. Digital modulation
C. Multiplexing
D. Phase modulation