Data Communication & Networking MCQs Set-11

This Portion of Data Communication and Networking contains more frequently asked MCQs (Multiple Choice Questions and Answers) / Objective Type Questions and Answers in the various Competitive Examinations.
 

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1
. A form of modulation in which the amplitude of a carrier wave is varied in accordance with some characteristics of the modulating signal, is known as ___________
  • angle modulation
  • aloha
  • amplitude modulation
  • modem
2
. Modulation in which two binary values are represented by two different amplitudes of the carrier frequency is known as ___________
  • amplitude shift keying
  • amplitude
  • amplitude modulation
  • aloha
3
. The simultaneous transmission of data to a number of stations is known as ____________
  • broadcast
  • bandwidth
  • analog transmission
  • aloha
4
. Which layer of OSI determines the interface of the system with the user?
  • Network
  • Application
  • Data link
  • Physical
5
. Which of the following condition is used to transmit two packets over a medium at the same time?
  • Synchronous
  • Collision
  • Contention
  • Asynchronous
6
. Which of the following summation operation is performed on the bits to check an error-detecting code?
  • Codec
  • Coder-decoder
  • Checksum
  • Attenuation
7
. Frame relay operates in the _________
  • application, presentation
  • session, transport
  • physical, data link
  • data link, network
8
. Repeaters function in the ________ layers
  • application, presentation
  • session, transport
  • physical, data link
  • data link, network
9
. Which of the following is not a connecting device?
  • Bridge
  • Gateway
  • Transceiver
  • Hub
10
. Which layer in the network supports Gateways?
  •  Lower 3
  • Upper 4
  • All 7 Layers
  • All but the physical layer

 
 
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