Data Communication and Networking – Cellular Telephone system MCQs

This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Cellular Telephone system”.
 

1
. The most common dial-up service used by a person making a home telephone call is _______
  • analog switched service
  • analog leased service
  • switched/56 service
  • digital data service
2
. The bandwidth on a local loop is between _______
  • 0 Hz to 400 Hz
  • 0 Hz to 4000 Hz
  • 1000 Hz to 4000 Hz
  • 4000 Hz to 8000 Hz
3
. A line can have less attenuation and less distortion if it is _______
  • switched
  • conditioned
  • unconditioned
  • dedicated
4
. In the analog hierarchy, twelve voice channels are multiplexed to create a _______
  • group
  • super group
  • master group
  • jumbo group
5
. In the analog hierarchy, a _______ consists of 60 independent voice channels.
  • group
  • super group
  • master group
  • jumbo group
6
. In the analog hierarchy, a _______ consists of 600 independent voice channels
  • group
  • super group
  • master group
  • jumbo group
7
. In the analog hierarchy, a _______ consists of 3600 independent voice channels
  • group
  • super group
  • master group
  • jumbo group
8
. Which digital service requires a DSU?
  • switched/56 service
  • DDS
  • DS
  • a and b
9
. Which of the following about switched/56 service is true?
  • Subscribers need modems.
  • Data is analog.
  • A DSU changes the analog data to digital.
  • Sender and receiver must both subscribe to the service.
10
. _______ is a digital leased line with a maximum data rate of 64 Kbps
  • DS
  • DDS
  • Switched/56 service
  • Analog switched service Analog switched service
11
. In the DS service hierarchy, _______ resembles DDS
  • DS-0
  • DS-1
  • DS-2
  • DS-3
12
. A DS-0 service is a single digital channel of _______
  • 4000 Kbps
  • 2000 Kbps
  • 1000 Kbps
  • 64 Kbps
13
. A DS-4 service can be composed of 4032 _______ channels
  • DS-0
  • DS-1
  • DS-2
  • DS-3
14
. A DS-4 service is implemented by a _______.
  • DS line
  • T-4 line
  • DS-4 line
  • none of the above
15
. T lines can be used for _______.
  • digital data transmission
  • digital voice transmission
  • regular telephone transmission
  • any of the above
16
. For a telephone voice transmission to use a T-line, the signal must be _______ before being multiplexed
  • synchronized
  • modulated
  • sampled
  • filtered

 
 
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