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
