Transmission
Media
1. ………………… cables are very cheap and easy to install, but
they are badly affected by noise interference.
A) STP
B) UTP
C) Co-axial
D) Optical Fiber
Ans : 1. B) UTP
2. Twisting of wires in twisted pair cable helps to
A) increase the data speed
B) reduce the effect of noise or external interface
C) make the cable stronger
D) make the cable attractive
Ans : 2. B) reduce the effect or noise or external interface
.
3. Applications of twisted pair cable is/are
i) In telephone lines to carry voice and data channels
ii) In the DSL line (ADSL)
iii) In the ISDN (Integrated Services Digital Network)
iv) In thick and thin Ethernet
A) i, ii and iii only
B) i, iii and iv only
C) ii, iii and iv only
D) All i, ii, iii and iv only
Ans : 3. A) i, ii and iii only
4. ……………… UTP cables were originally used for voice
communication with low data rates.
A) Category 1
B) Category 2
C) Category 1 and 2
D) Category 1, 2 and 3
Ans : 4. C) Category 1 and 2
5. Category 4 UTP cable offers data rates up to …………..
A) 10 Mbps
B) 15 Mbps
C) 20 Mbps
D) 25 Mbps
Ans : 5. C) 20 Mbps
6. Category 6 UTP cable offers data rates up to …………..
A) 100 Mbps
B) 200 Mbps
C) 300 Mbps
D) 400 Mbps
Ans : 6. B) 200 Mbps
7. State whether the following statements are True for
twisted pair cable.
i) The attenuation of both STP and UTP ii) The cost of UTP is
higher than STP iii) The installation of
STP is fairly easy than UTP
A) i and iii only
B) i and ii only
C) ii and iii only
D) All i, ii and iii
Ans : 7. A) i and iii only
8. A modulator
……………….. telephone connector is used to connect a four pair twisted pair cable.
A) RJ35
B) RJ45
C) RJ11
D) RJ21
Ans : 8. B) RJ45
9. ………………….. cable also find application in cable television
networks for computer communications.
A) Co-axial
B) UTP
C) STP
D) Optical Fiber
Ans : 9. A) Co-axial
10. ………………… cable
suffers more impairment than ……………… cable which in turn suffers more than ……………
A) Co-axial, Twisted, Optical Fiber
B) Twisted, Co-axial, Optical Fiber
C) Co-axial, Optical Fiber, Twisted
D) Twisted, Optical Fiber, Co-axial
Ans : 10. B) Twisted, Co-axial, Optical Fiber
11. ………………….. is the overlapping of frequency bands which can
distort/wipe-out a signal.
A) Noise
B) Attenuation
C) Interference
D) Distortion
Ans : 11. C) Interference
12. State the
following statements are True or False for the characteristics of Co-axial
cable.
i) Due to the shield provided, this cable has excellent noise
immunity
ii) It has large bandwidth and low losses
iii) The attenuation is high as compared to the twisted pair.
A) True, True, False
B) False, True, True
C) True, False, False
D) False, False, True
Ans : 12. A) True, True, False
13. ……………. cable is
suitable for point to point or point to multi-point applications. In fact, this
is the most widely used medium for local area networks.
A) Optical Fiber
B) UTP
C) STP
D) Co-axial
Ans : 13. D) Co-axial
14. Co-axial cables which are categorized under ……………..
RG(Radio Government) ratings used for thick ethernet.
A) RG – 11
B) RG – 12
C) RG – 58
D) RG – 59
Ans : 14. A) RG – 11
15. Co-axial cables which are categorized under ……………..
RG(Radio Government) ratings used for cable TV.
A) RG – 11
B) RG – 12
C) RG – 58
D) RG – 59
Ans : 15. D) RG – 59
16. Which of the following is/are the applications of
Co-axial cables.
i) In the DSL line ii)
Analog telephone networks iii) Thick and
thin Ethernet iv) Cable TV
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
A) All i, ii, iii and iv
Ans : 16. B) ii, iii and iv only
17. The different types of BNC (Bayonet-Neill-Concelman)
connectors used for Co-axial cable is/are
i) BNC connector ii)
BNC-L connector iii) BNC-T
connector iv) BNC terminator
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
A) All i, ii, iii and iv
Ans : 17. C) i, iii and iv only
18. The ………………. connector is used in Ethernet networks for
branching out a cable for connection to a computer or other devices.
A) BNC connector
B) BNC-L connector
C) BNC-T connector
D) BNC terminator
Ans : 18. C) BNC-T connector
19. The ……………………. is used at the end of the cable to present
the reflection of the signal.
A) BNC connector
B) BNC-L connector
C) BNC-T connector
D) BNC terminator
Ans : 19. D) BNC terminator
20. The ……………. cable was initially developed as the backbone
of analog telephone networks where a single telephone cable would be used to
carry more that 10,000 voice channels at a time.
A) Optical Fiber
B) UTP
C) STP
D) Co-axial
Ans : 20. D) Co-axial
21) In …………….. transmission system are widely used in the
backbone of the network.
A) Fiber optic
B) Co-axial
C) UTP
D) STP
Ans :
21. A) Fiber optic
22. State the
following statements are True or False for the applications of optical fiber
cables.
i) Optical fiber is now used in telephone systems.
ii) The installation cost of optical fibers is higher than
that for the Co-axial cables.
iii) They are used for analog telephone networks.
A) i-True, ii-False, iii-True
B) i-True, ii-True, iii-True
C) i-False, ii-True, iii-False
D) i-True, ii-True, iii-False
Ans : 22. D) i-True, ii-True, iii-False
23. The sources of light for optical fiber communication
…………….. provides an unfocused light which hits the core boundaries and gets discussed.
A) ILD
B) LED
C) LOD
D) ELD
Ans : 23. B) LED
24. In optical fiber communication, the ………………. can provide a
very focused beam that can be used for long-distance communication.
A) ILD
B) LED
C) LOD
D) ELD
Ans : 24. A) ILD
25. Which of the following statements are True for step-index
and graded-index fibers.
i) The light rays travel in straight lines through the
step-index fibers.
ii) The acceptance cone of graded-index fibers is smaller
than that of the step-index fiber.
iii) In graded-index fiber, the light rays do not travel in a
straight line due to continuous refraction.
A) i and ii only
B) i and iii only
C) ii and iii only
D) All i, ii and iii
Ans : 25. B) i and iii only
26. State True or False for the following statements about
single-mode and multi-mode fibers.
i) Multi-mode fiber
can have either a step-index or a graded-index profile.
ii) Single-mode fiber is a high-quality fiber for wideband
long haul transmission.
iii) The amount of dispersion introduced in single-mode fiber
is greater than that introduced in the multi-mode fibers.
A) i-True, ii-False, iii-True
B) i-True, ii-True, iii-True
C) i-False, ii-True, iii-False
D) i-True, ii-True, iii-False
Ans : 26. D) i-True, ii-True, iii-False
27. ………… cable has much lower attenuation and can carry the
signal to longer distances without using amplifiers and repeaters in between.
A) Optical fiber
B) Co-axial
C) UTP
D) STP
Ans : 27. A) Optical fiber
28. ………………. cable is not affected by EMI effects and can be
used in areas where high voltage are passing by.
A) Fiber optic
B) Co-axial
C) UTP
D) STP
Ans : 28. A) Fiber optic
29. State whether the following statements are True for the
characteristics of optical fiber cables.
i) The cost of fiber optic cable is more compared to twisted
pair and Co-axial.
ii) The installation of fiber optic cables is easier.
iii) The number of modes that a fiber optic can support does
not depend on its length.
A) i and ii only
B) i and iii only
C) ii and iii only
D) All i, ii and iii
Ans : 29. B) i and iii only
30. ……………….. cable is not affected by potential shifts in the
electrical ground, nor does it produce sparks.
A) Fiber optic
B) Co-axial
C) UTP
D) STP
Ans : 30. A) Fiber optic
31. Which of the following are the advantages of fiber optic
communication over the conventional means of communication?
i) Small size and lightweight
ii) Easy availability and low cost
iii) No electrical or electromagnetic interference iv) Large bandwidth
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv
Ans : 31. D) All i, ii, iii and iv
32. Which of the following are the drawbacks of optical
fiber?
i) Ground loops are absent
ii) The initial cost incurred in high
iii) Joining the optical fiber is a difficult job
A) i and ii only
B) i and iii only
C) ii and iii only
D) All i, ii and iii
Ans : 32. C) ii and iii only
33. Fiber optic cables use three types of connectors which
are
i) SC connector ii)
BC connector iii) ST connector iv) LT-RJ connector v) MT-RJ connector
A) i, iii and v only
B) iii, iv an v only
C) i, iii and v only
D) ii, iii and iv only
Ans : 33. C) i, iii and v only
34. The ……………. is used for cable TV, which uses a push/pull
locking system.
A) SC connector
B) BC connector
C) ST connector
D) MT-RJ connector
Ans : 34. A) SC connector
35. The ……………. connector is used for connecting a cable to
networking devices, which uses a bayonet locking system.
A) SC connector
B) BC connector
C) ST connector
D) MT-RJ connector
Ans : 35. C) ST connector
36. In …………… short circuit between the two conductors is not
possible.
A) Optical fiber
B) Co-axial
C) UTP
D) STP
Ans : 36. A) Optical fiber
37. In …………….. power
loss occurs due to absorption, scattering, dispersion and bending.
A) Optical fiber
B) Co-axial
C) UTP
D) STP
Ans : 37. A) Optical fiber
38. In …………….. EMI is reduced due to shielding.
A) Optical fiber cable
B) Co-axial cable
C) UTP cable
D) STP cable
Ans : 38. B) Co-axial cable
39. In Co-axial cable, the node capacity per segment is ………..
A) 4o to 110
B) 30 to 90
C) 30 to 100
D) 40 to 100
Ans : 39. C) 30 to 100
40. …………… is less affected due to the external magnetic
field.
A) Optical fiber cable
B) Co-axial cable
C) UTP cable
D) STP cable
Ans : 40. B) Co-axial cable
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