Physical Layer (OSI Model) Interview/Exam Question-Answer

Q.1 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

Ans : bit-by-bit delivery

Q.2 Which transmission media provides the highest transmission speed in a network?

       A. coaxial cable

       B. twisted pair cable

       C. optical fiber

       D. electrical cable

Ans : optical fiber

Q.3 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

Ans : Digital Modulation

Q.4 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

Ans : physical signalling sublayer

Q.5 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 above

Ans : All of the above

Q.6 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

Ans : both start & stop signalling and flow control

Q.7 The physical layer is responsible for __________.

       A. line coding

       B. channel coding

       C. modulation

       D. All of the above

Ans : All of the above

Q.8 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

Ans : data link layer

Q.9 A single channel is shared by multiple signals by ____________.

       A. analog modulation

       B. digital modulation

       C. multiplexing

       D. phase modulation

Ans : multiplexing

Q.10 Wireless transmission of signals can be done via ___________.

       A. radio waves

       B. microwaves

       C. infrared

       D. all of the above

Ans : all of the above

Leave a Comment