Networking Chapter 6 Flashcards
Which multiplexing technique is used for analog signals?
FDM
Which multiplexing technique is used for digital signals?
TDM
Which multiplexing technique shifts each signal to a different carrier frequency?
FDM
Which multiplexing technique involves signals composed of light beams?
WDM
________ is the set of techniques that allows the simultaneous transmission of multiple signals across a single data link.
Multiplexing
____ is designed to use the high bandwidth capability of fiber-optic cable.
WDM
______ is an analog multiplexing technique to combine optical signals.
WDM
_____ is a digital process that allows several connections to share the high bandwidth of a link.
TDM
We can divide ____ into two different schemes: synchronous or statistical.
TDM
In ________ TDM, each input connection has an allotment in the output even if it is not sending data.
synchronous
In ________ TDM, slots are dynamically allocated to improve bandwidth efficiency.
statistical
The _______ technique uses M different carrier frequencies that are modulated by the source signal. At one moment, the sign modulates one carrier frequency; at the next moment, the signal modulates another carrier frequency.
FHSS
The ______ technique expands the bandwidth of a signal by replacing each data bit with n bits using a spreading code.
DSSS
Groups, super groups, master groups, and jumbo groups are terms used in ______________.
FDM
Multilevel multiplexing is a strategy used in ___________.
TDM
Multislot allocation is a strategy used in ___________.
TDM
Pulse stuffing is a strategy used in ___________.
TDM
Frame synchronization is a strategy used in ___________.
TDM
A T-1 line uses ___________ frames.
8000
We need addressing mechanism in ___________ TDM.
statistical
What is TDM?
Time-division multiplexing; this occurs when you transmit and receive independent signals over a common path by using synchronized switches at each end, so that each signal appears on the line only for a fraction of a second.
What is FDM?
Frequency-division multiplexing; this is where the bandwidth in a cable is divided among a series of non-overlapping frequency sub-bands, each of which is used for a separate signal.
What is WDM?
Wavelength-division multiplexing; this is where a number of optical signals are carried on a single fibre, each occupying a different wavelength of light.
What is DSSS?
Direct-sequence spread specturm; this is a modulation technique where the transmitted signal takes up more bandwidth than the information signal that modulates the carrier or broadcast frequency.
