Telecomm and Wireless
Communications - D413 - Review Q&A
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Describe how data is transferred across a fiber-optic cable. - correct Ans: Data is transferred across a
fiber-optic cable using light signals that travel through the core of the cable. The core is surrounded by
cladding that reflects light back into the core, allowing it to travel long distances without significant loss.;
List advantages of fiber-optic cable over copper-core cable. - correct Ans: Advantages include higher
bandwidth, greater immunity to electromagnetic interference (EMI), longer transmission distances, and
lighter weight.; Light is measured by its _____. - correct Ans: Light is measured by its wavelength.; What
is the wavelength range of visible light? - correct ans:The wavelength range of visible light is
approximately 400 to 700 nanometers (nm).;What are the three common wavelengths associated with
fiber-optic cable? - correct ans:The three common wavelengths are 850 nm, 1310 nm, and 1550 nm.;
What is dispersion? - correct Ans: Dispersion refers to the spreading of light pulses as they travel down
the fiber-optic cable, which can cause distortion and limit the transmission distance.;Name three
physical factors that contribute to extrinsic losses. - correct ans:Extrinsic losses can be caused by factors
such as bending of the cable, imperfections in connectors, and contamination on the fiber
surfaces.;Describe Fresnel reflection loss. - correct ans:Fresnel reflection loss occurs when a portion of
the light signal is reflected back at a connection point due to differences in refractive indices between
materials.;What are the two classifications of fiber-optic cable based on the diameter of the core? -
correct ans:Single-mode fiber (SMF) and multimode fiber (MMF).;How does the diameter of the fiber-
optic cable core affect the distance light can travel? - correct ans:A larger core diameter (as in
multimode fiber) allows light to travel shorter distances without dispersion compared to single-mode
fiber, which has a smaller core.;Fiber-optic cable core diameter is expressed in _____. - correct
ans:Micrometers (µm) or sometimes in terms of the mode field diameter (MFD).;What are the two most
common sizes of multimode fiber-optic cable? - correct ans:62.5 µm (OM1) and 50 µm (OM2, OM3,
OM4, OM5).;What is the IEEE 802 standard for Gigabit Ethernet? - correct ans:IEEE 802.3ab.;What is the
IEEE 802 standard for 10 Gigabit Ethernet? - correct ans:IEEE 802.3ae.;What do the following 10 Gigabit
Ethernet acronyms represent: SW, LW, and EW? - correct ans:SW (Short Wave), LW (Long Wave), and
EW (Extended Wave) refer to different types of 10 Gigabit Ethernet optics and transmission
distances.;What is the range of FDDI? - correct ans:FDDI operates over a maximum ring length of 200
kilometers.;Why does FDDI use two rings of cable? - correct ans:FDDI uses dual rings for redundancy and
reliability; if one ring fails, the network can still operate using the second ring.;List the five most
Communications - D413 - Review Q&A
Ch.3 exam with comprehensive
questions and well elaborated and
correct answers graded A+
Professional Academic Assistance Services
Services Offered
Proctored Exam Assistance
Online Class Management (Full Course Support)
Exam Preparation & Study Materials
Assignments and Coursework Support
Essays and Research Papers
Discussion Posts and Replies
, Contact Information
Email:
WhatsApp: +254705994759
Describe how data is transferred across a fiber-optic cable. - correct Ans: Data is transferred across a
fiber-optic cable using light signals that travel through the core of the cable. The core is surrounded by
cladding that reflects light back into the core, allowing it to travel long distances without significant loss.;
List advantages of fiber-optic cable over copper-core cable. - correct Ans: Advantages include higher
bandwidth, greater immunity to electromagnetic interference (EMI), longer transmission distances, and
lighter weight.; Light is measured by its _____. - correct Ans: Light is measured by its wavelength.; What
is the wavelength range of visible light? - correct ans:The wavelength range of visible light is
approximately 400 to 700 nanometers (nm).;What are the three common wavelengths associated with
fiber-optic cable? - correct ans:The three common wavelengths are 850 nm, 1310 nm, and 1550 nm.;
What is dispersion? - correct Ans: Dispersion refers to the spreading of light pulses as they travel down
the fiber-optic cable, which can cause distortion and limit the transmission distance.;Name three
physical factors that contribute to extrinsic losses. - correct ans:Extrinsic losses can be caused by factors
such as bending of the cable, imperfections in connectors, and contamination on the fiber
surfaces.;Describe Fresnel reflection loss. - correct ans:Fresnel reflection loss occurs when a portion of
the light signal is reflected back at a connection point due to differences in refractive indices between
materials.;What are the two classifications of fiber-optic cable based on the diameter of the core? -
correct ans:Single-mode fiber (SMF) and multimode fiber (MMF).;How does the diameter of the fiber-
optic cable core affect the distance light can travel? - correct ans:A larger core diameter (as in
multimode fiber) allows light to travel shorter distances without dispersion compared to single-mode
fiber, which has a smaller core.;Fiber-optic cable core diameter is expressed in _____. - correct
ans:Micrometers (µm) or sometimes in terms of the mode field diameter (MFD).;What are the two most
common sizes of multimode fiber-optic cable? - correct ans:62.5 µm (OM1) and 50 µm (OM2, OM3,
OM4, OM5).;What is the IEEE 802 standard for Gigabit Ethernet? - correct ans:IEEE 802.3ab.;What is the
IEEE 802 standard for 10 Gigabit Ethernet? - correct ans:IEEE 802.3ae.;What do the following 10 Gigabit
Ethernet acronyms represent: SW, LW, and EW? - correct ans:SW (Short Wave), LW (Long Wave), and
EW (Extended Wave) refer to different types of 10 Gigabit Ethernet optics and transmission
distances.;What is the range of FDDI? - correct ans:FDDI operates over a maximum ring length of 200
kilometers.;Why does FDDI use two rings of cable? - correct ans:FDDI uses dual rings for redundancy and
reliability; if one ring fails, the network can still operate using the second ring.;List the five most
