This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Cellular Telephone system”.
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
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
A. analog switched 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
B. 0 Hz to 4000 Hz
3. A line can have less attenuation and less distortion if it is _______
- switched
- conditioned
- unconditioned
- dedicated
B. conditioned
4. In the analog hierarchy, twelve voice channels are multiplexed to create a _______
- group
- super group
- master group
- jumbo group
A. group
5. In the analog hierarchy, a _______ consists of 60 independent voice channels.
- group
- super group
- master group
- jumbo group
B. super group
6. In the analog hierarchy, a _______ consists of 600 independent voice channels
- group
- super group
- master group
- jumbo group
C. master group
7. In the analog hierarchy, a _______ consists of 3600 independent voice channels
- group
- super group
- master group
- jumbo group
D. jumbo group
8. Which digital service requires a DSU?
- switched/56 service
- DDS
- DS
- a and b
A. switched/56 service
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.
D. 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
B. DDS
11. In the DS service hierarchy, _______ resembles DDS
- DS-0
- DS-1
- DS-2
- DS-3
A. DS-0
12. A DS-0 service is a single digital channel of _______
- 4000 Kbps
- 2000 Kbps
- 1000 Kbps
- 64 Kbps
D. 64 Kbps
13. A DS-4 service can be composed of 4032 _______ channels
- DS-0
- DS-1
- DS-2
- DS-3
A. DS-0
14. A DS-4 service is implemented by a _______.
- DS line
- T-4 line
- DS-4 line
- none of the above
D. none of the above
15. T lines can be used for _______.
- digital data transmission
- digital voice transmission
- regular telephone transmission
- any of the above
D. 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
C. sampled
