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16. A distributed data processing configuration in which all activities must pass through a centrally located computer is called a:
A. ring network
B. spider network
C. hierarchical network
D. data control network
E. None of the above
17. The size or magnitude of a voltage or current waveform is
A. Amplitude
B. Aloha
C. Angle Modulation
D. Attenuation
E. None of the above
18. Which of the following network access standard is used for connecting stations to a circuit-switched network?
A. X.3
B. X.21
C. X.25
D. X.75
E. None of the above
19. Which of the following is not a transmission medium?
A. telephone lines
B. coaxial cable
C. modem
D. microwave systems
E. satellite systems
20. Which of the following statement is incorrect?
A. Gateways are assumed to know correct routes; hosts begin with minimal routing information and learn new routes from gateways.
B. Layered protocols are designed so that layer n at the destination receives exactly the same object sent by layer n at the source.
C. Application programs as well as all protocol software from the Internet layer upward use only IP addresses; the network interface layer handles physical addresses.
D. All of the above
E. None of the above
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