In this section of Data Communication and Networking – Transmission Media MCQ (multiple choice) Based Questions and Answers,it cover the below lists of topics.All the Multiple Choice Questions and Answers (MCQs) have been compiled from the book of Data Communication and Networking by The well known author behrouz forouzan.
- Transmission media MCQs.
- Twisted pair cable, coaxial cable, and optical fiber cable MCQs.
- Multimode step-index propagation MCQs.
- Multimode graded-index propagation MCQs.
- Unguided media – ground propagation, sky propagation, and line-of-sight propagation MCQs.
- Radio waves, Microwaves, or Infrared waves MCQs
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
1. When the angle of incidence is _______ the critical angle, the light beam bends along the interface.
- more than
- less than
- equal to
- none of the above
C. equal to
2. Signals with a frequency below 2 MHz use _______ propagation.
- ground
- sky
- line-of-sight
- none of the above
A. ground
3. Signals with a frequency between 2 MHz and 30 MHz use ______ propagation
- ground
- sky
- line-of-sight
- none of the above
B. sky
4. Signals with a frequency above 30 MHz use _______propagation
- ground
- sky
- line-of-sight
- none of the above
C. line-of-sight
5. A parabolic dish antenna is a(n) _______ antenna.
- omnidirectional
- bidirectional
- unidirectional
- horn
C. unidirectional
6. A(n) _____ medium provides a physical conduit from one device to another.
- guided
- unguided
- either (a) or (b)
- none of the above
B. unguided
7. ________ cable consists of two insulated copper wires twisted together.
- Coaxial
- Fiber-optic
- Twisted-pair
- none of the above
C. Twisted-pair
8. _______ cable is used for voice and data communications.
- Coaxial
- Fiber-optic
- Twisted-pair
- none of the above
C. Twisted-pair
9. _________ consists of a central conductor and a shield.
- Coaxial
- Fiber-optic
- Twisted-pair
- none of the above
A. Coaxial
10. _____ cable can carry signals of higher frequency ranges than _____ cable.
- Twisted-pair; fiber-optic
- Coaxial; fiber-optic
- Coaxial; twisted-pair
- none of the above
C. Coaxial; twisted-pair
11. ______ cables are composed of a glass or plastic inner core surrounded by cladding, all encased in an outside jacket.
- Coaxial
- Fiber-optic
- Twisted-pair
- none of the above
B. Fiber-optic
12. ______ cables carry data signals in the form of light.
- Coaxial
- Fiber-optic
- Twisted-pair
- none of the above
B. Fiber-optic
13. In a fiber-optic cable, the signal is propagated along the inner core by _______
- reflection
- refraction
- modulation
- none of the above
A. reflection
14. _________ media transport electromagnetic waves without the use of a physical conductor
- Guided
- Unguided
- Either (a) or (b)
- None of the above
B. Unguided
15. Radio waves are _________
- omnidirectional
- unidirectional
- bidirectional
- none of the above
A. omnidirectional
16. Microwaves are _________
- omnidirectional
- unidirectional
- bidirectional
- none of the above
B. unidirectional
17. _______ are used for cellular phone, satellite, and wireless LAN communications.
- Radio waves
- Microwaves
- Infrared waves
- none of the above
B. Microwaves
18. ________ are used for short-range communications such as those between a PC and a peripheral device.
- Radio waves
- Microwaves
- Infrared waves
- none of the above
C. Infrared waves
19. Transmission media are usually categorized as _______.
- fixed or unfixed
- guided or unguided
- determinate or indeterminate
- metallic or nonmetallic
B. guided or unguided
20. Transmission media lie below the _______ layer.
- physical
- network
- transport
- application
A. physical
21. ______ cable consists of an inner copper core and a second conducting outer sheath.
- Twisted-pair
- Coaxial
- Fiber-optic
- Shielded twisted-pair
B. Coaxial
22. In fiber optics, the signal is _______ waves.
- light
- radio
- infrared
- very low-frequency
A. light
23. Which of the following primarily uses guided media?
- cellular telephone system
- local telephone system
- satellite communications
- radio broadcasting
B. local telephone system
24. Which of the following is not a guided medium?
- twisted-pair cable
- coaxial cable
- fiber-optic cable
- atmosphere
D. atmosphere
25. What is the major factor that makes coaxial cable less susceptible to noise than twisted-pair cable?
- inner conductor
- diameter of cable
- outer conductor
- insulating material
C. outer conductor
26. In an optical fiber, the inner core is _______ the cladding.
- denser than
- less dense than
- the same density as
- another name for
A. denser than
27. The inner core of an optical fiber is _______ in composition.
- glass or plastic
- copper
- bimetallic
- liquid
A. glass or plastic
28. When a beam of light travels through media of two different densities, if the angle of incidence is greater than the critical angle, _______ occurs.
- reflection
- refraction
- incidence
- criticism
A. reflection
