Computer Networks Questions & Answers –
Multiplexing
1. The sharing of a medium and its
link by two or more devices is called _________
a) Fully duplexing
b) Multiplexing
c) Both Fully duplexing and Multiplexing
d) Duplexing
a) Fully duplexing
b) Multiplexing
c) Both Fully duplexing and Multiplexing
d) Duplexing
Answer: b
Explanation: Multiplexing is a method using which one can send multiples signals through a shared medium at the same time. This helps in using less resources and thus saving the cost of sending messages.
Explanation: Multiplexing is a method using which one can send multiples signals through a shared medium at the same time. This helps in using less resources and thus saving the cost of sending messages.
2. Multiplexing is used in _______
a) Packet switching
b) Circuit switching
c) Data switching
d) Packet & Circuit switching
a) Packet switching
b) Circuit switching
c) Data switching
d) Packet & Circuit switching
Answer: b
Explanation: Circuit switching is a switching method by which one can obtain a physical path between end points. Circuit switching method is also called a connection oriented network.
Explanation: Circuit switching is a switching method by which one can obtain a physical path between end points. Circuit switching method is also called a connection oriented network.
3. Which multiplexing technique
transmits digital signals?
a) FDM
b) TDM
c) WDM
d) FDM & WDM
a) FDM
b) TDM
c) WDM
d) FDM & WDM
Answer: b
Explanation: TDM abbreviation for Time DIvision Multiplexing is a method used for digital signals. Whereas FDM and WDM abbreviation for Frequency DIvision Multiplexing and Wavelength Division Multiplexing are used for analog signals.
Explanation: TDM abbreviation for Time DIvision Multiplexing is a method used for digital signals. Whereas FDM and WDM abbreviation for Frequency DIvision Multiplexing and Wavelength Division Multiplexing are used for analog signals.
4. If there are n signal sources of
same data rate than TDM link has _______ slots.
a) n
b) n/2
c) n*2
d) 2n
a) n
b) n/2
c) n*2
d) 2n
Answer: a
Explanation: When it comes to TDM, each and every slots are dedicated to the source.
Explanation: When it comes to TDM, each and every slots are dedicated to the source.
5. If link transmits 4000frames per
second, and each slot has 8 bits, the transmission rate of circuit this TDM is
_________
a) 32kbps
b) 500bps
c) 500kbps
d) None of the mentioned
a) 32kbps
b) 500bps
c) 500kbps
d) None of the mentioned
Answer: a
Explanation: Transmission rate= frame rate * number os bits in a slot.
Explanation: Transmission rate= frame rate * number os bits in a slot.
6. The state when dedicated signals
are idle are called __________
a) Death period
b) Poison period
c) Silent period
d) None of the mentioned
a) Death period
b) Poison period
c) Silent period
d) None of the mentioned
Answer: c
Explanation: There are instances when connection between two endpoints have been established, but no communication or transfer of messages occur. This period of time is called silent period.
Explanation: There are instances when connection between two endpoints have been established, but no communication or transfer of messages occur. This period of time is called silent period.
7. Multiplexing can provide
_________
a) Efficiency
b) Privacy
c) Anti jamming
d) Both Efficiency & Privacy
a) Efficiency
b) Privacy
c) Anti jamming
d) Both Efficiency & Privacy
Answer: d
Explanation: Multiplexing helps us to transfer our messages over a shared channel. This brings up the issue of privacy and efficiency. Fortunately, Multiplexing has high efficiency and high privacy when implemented.
Explanation: Multiplexing helps us to transfer our messages over a shared channel. This brings up the issue of privacy and efficiency. Fortunately, Multiplexing has high efficiency and high privacy when implemented.
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