The layers of the OSI model, from the top down are - answer-application, presentation, session, transport, network, data link, physical
The lower layer of the data link layer is called - answer-Media Access Control
IP is implemented at which TCP/IP model layer? - answer-IP
benefits of usin...
Telecommunications Exam 1
The layers of the OSI model, from the top down are - answer-application, presentation, session,
transport, network, data link, physical
The lower layer of the data link layer is called - answer-Media Access Control
IP is implemented at which TCP/IP model layer? - answer-IP
benefits of using a layered network model? - answer-it facilitates troubleshooting;
it breaks the complex process of networking into more manageable chunks ;
it allows layers developed by different vendors to interoperate
OSI stands for - answer-Open Systems Interconnect
Error detection and recovery takes place at which two layers of the OSI model - answer-Data
link
Transport
The network layer uses physical addresses to route data to the destination - answer-False
Which of the following is a transport layer protocol - answer-TCP
Bits are packaged into frames at which layer of the OSI model - answer-Data link
From the below options, select the two sublayers of the data link layers - answer-MAC- Media
Access Control
LLC- Logical Link Control
A pulse amplitude scheme that uses 10 bits to represent each amplitude is capable of
representing ______ different amplitudes - answer-1024
The height of a sound wave is called its ______. - answer-Amplitude
With respect to converting digital data into analog signals, AM stands for - answer-Amplitude
Modulation
What device is used to turn analog sound waves into a bit stream for transmission over a digital
circuit? - answer-Codec
refers to the difference between the original analog data and the approximation of that data
using the techniques for translating from analog data to digital signals - answer-Quantization
errors
separate channels to reduce interference between channels in frequency division multiplexing -
answer-Guard bands
Time (non-statistical) division multiplexing differs from frequency division multiplexing because
it: - answer-Splits a circuit vertically rather than horizontally
, can be thought of as dividing the circuit horizontally - answer-Frequency division multiplexing
A(n) ______ divides one high-speed communication circuit into several lower speed circuits for
the primary reason of saving communication line costs - answer-multiplexer
Frequency division multiplexing - answer-operates by dividing a signal into frequency ranges
The type of multiplexer that divides the circuit horizontally into different light frequencies that are
transmitted simultaneously across many channels is a - answer-Wave division multiplexer
What is the decimal value of the byte 00000011 - answer-3
What is the binary representation of 12? (include leading zeros so that your answer is a byte) -
answer-00001100
What is the decimal value of the byte 11111111? - answer-255
The loss of strength of a signal as it travels over distance is called - answer-attenuation
allows multiple conversations simultaneously travel over a single physical circuit. - answer-
Multiplexing
Another name for a point to point circuit is a _________________ circuit. - answer-dedicated
Logical circuits are described in terms of the media, connectors, and devices used to implement
the circuit. - answer-False
allows a physical circuit to partitioned into multiple logical circuits - answer-Multiplexing
refers to the transmission characteristics of a connection - answer-Virtual circuit
A circuit over which the connected parties can transmit and receive simultaneously is referred to
as: - answer-Full duplex
A(n) __________ circuit is another name for a multipoint configuration - answer-shared
Which is not true about point-to-point circuits? - answer-point-to-point circuits are more
efficiently than multipoint circuits
Having a conversation with someone using a cellular phone is an example of _________
transmission. - answer-full-duplex
The two basic types of media are - answer-Guided and unguided
Another term for the weakening of a signal as it travels over distance is: - answer-Attenuation
refers to the spreading of the signal so that different parts of the signal arrive at different times
at the destination - answer-Dispersion
Which of the following media is highly secure and can withstand harsh environmental condition -
answer-Fiber optic
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