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Which phenomenon allows light to remain confined within an optical fiber?
a. Diffraction
b. Total internal reflection
c. Refraction
d. Dispersion
Answer: b. Total internal reflectiontestbook
What is the primary material used in the core of optical fibers for networking?
a. Plastic
b. Glass
c. Copper
d. Silver
Answer: b. Glasstestbook
Which of the following cables has the highest bandwidth capacity?
a. Twisted pair
b. Coaxial
c. Optical fiber
d. Ethernet
Answer: c. Optical fibertestbook
What is the usual data rate supported by modern optical fibers?
a. 56 Kbps
b. 500 Kbps
c. 10 Mbps
d. 10 Gbps
Answer: d. 10 Gbpstestbook
The outer layer of an optical fiber that has a lower refractive index than the core is called:
a. Cladding
b. Jacket
c. Sheath
d. Buffer
Answer: a. Claddingtestbook
What type of signal is transmitted in optical fiber networking?
a. Electric
b. Optical
c. Mechanical
d. Radio
Answer: b. Opticaltestbook
Which property of fiber allows it to be immune to electromagnetic interference?
a. High conductivity
b. Plastic coating
c. Non-metallic transmission
d. Reflective sheathing
Answer: c. Non-metallic transmissiontestbook
Which type of fiber is best suited for long-distance communication?
a. Multimode graded-index
b. Single-mode
c. Step-index
d. Plastic fiber
Answer: b. Single-modesanfoundry
The process of joining two optical fibers permanently is known as:
a. Taping
b. Splicing
c. Soldering
d. Clamping
Answer: b. Splicingdiscountpdh
In fiber optics, attenuation is mainly caused by:
a. Thermal noise
b. Absorption, scattering, and bending
c. Capacitance
d. Radiation
Answer: b. Absorption, scattering, and bendingdiscountpdh
What is the main advantage of fiber over copper cables?
a. Easier installation
b. Higher bandwidth and lower attenuation
c. Cheaper cost
d. Stronger signal
Answer: b. Higher bandwidth and lower attenuationtestbook
Which is not a typical mode of optical fiber?
a. Single-mode
b. Multimode
c. Double mode
d. Step-index
Answer: c. Double modediscountpdh
In fiber optics, the angle at which light is confined within the core depends on:
a. Core diameter
b. Critical angle
c. Buffer thickness
d. Transmission rate
Answer: b. Critical angleexamradar
Which parameter represents the ability of a fiber to carry information?
a. Current rating
b. Attenuation rate
c. Bandwidth-distance product
d. Reflection index
Answer: c. Bandwidth-distance producttestbook
What is the function of optical amplifiers in fiber networks?
a. Improve reliability
b. Reduce fiber length
c. Increase transmission speed
d. Boost signal strength
Answer: d. Boost signal strengthquiz-maker
Which connector type is commonly used in modern fiber optic cabling?
a. RJ-45
b. SC/LC/ST
c. BNC
d. F-Type
Answer: b. SC/LC/STscribd
Fiber optic cables are most often used for:
a. Short distance LANs only
b. High-speed backbone and long distance transmission
c. Low-bandwidth environments
d. Industrial control signals
Answer: b. High-speed backbone and long distance transmissiontestbook
The fiber coating that protects against physical damage is called:
a. Sheath
b. Buffer
c. Jacket
d. Shield
Answer: c. Jackettestbook
Which type of loss occurs at fiber bends?
a. Focal loss
b. Modal loss
c. Bending loss
d. Insertion loss
Answer: c. Bending lossdiscountpdh
In multimode fiber, what may cause signal dispersion?
a. Fiber attenuation
b. Modal dispersion
c. Refraction
d. Absorption
Answer: b. Modal dispersiontestbook
Passive Optical Networks (PON) are beneficial because they:
a. Require active equipment in the field
b. Lower power consumption and equipment costs
c. Increase electromagnetic interference
d. Use metallic cables
Answer: b. Lower power consumption and equipment costsscribd
Which topology is often implemented in optical fiber networks for resilience?
a. Bus
b. Ring
c. Tree
d. Mesh
Answer: d. Meshlastmomenttuitions
Which parameter in fiber design helps prevent escape of transmitted light?
a. Refractive index difference
b. Higher bandwidth
c. Modal dispersion
d. Reflection coefficient
Answer: a. Refractive index differencetestbook
The term ‘OTDR’ in fiber optics stands for:
a. Optical Transmission Data Recorder
b. Optical Time Domain Reflectometer
c. Optical Transmission Deflection Reader
d. Online Transmission Data Reporter
Answer: b. Optical Time Domain Reflectometerspecialized
Which of the following is NOT an advantage of fiber optic cable?
a. Immunity to electromagnetic interference
b. High bandwidth capability
c. Easy mechanical splicing
d. Long-distance transmission
Answer: c. Easy mechanical splicingspecialized
The increased distance and noise immunity of fiber make it suitable for:
a. Domestic Wi-Fi only
b. Metropolitan Area Networks (MAN)
c. Bluetooth communication
d. Low-speed signaling
Answer: b. Metropolitan Area Networks (MAN)testbook
Which network element in FTTH aggregates and manages traffic from multiple ONTs?
a. Splitter
b. Optical Line Terminal (OLT)
c. Hub
d. Node
Answer: b. Optical Line Terminal (OLT)scribd
What is the role of fiber optic couplers?
a. To amplify signals
b. To split or combine optical signals
c. To terminate fiber ends
d. To measure attenuation
Answer: b. To split or combine optical signalslastmomenttuitions
Which type of fiber cable is more resistant to environmental hazards?
a. Unarmored fiber
b. Armored fiber
c. Plastic coated fiber
d. Ribbon cable
Answer: b. Armored fiberscribd
Light travels in fiber cables due to:
a. Reflection at air-glass boundary
b. Refraction inside the glass
c. Total internal reflection between core-cladding
d. Diffraction of light
Answer: c. Total internal reflection between core-claddingtestbook
Which tool is used to measure signal loss in fiber optic cables?
a. Power meter
b. Punchdown tool
c. OTDR
d. Multimeter
Answer: c. OTDRspecialized
What does ‘LR’ in SFP-10G-LR indicate?
a. Low resistance
b. Long reach
c. Laser relay
d. Link redundancy
Answer: b. Long reachfluxlight
Which of the following is NOT a fiber optic connector?
a. SC
b. LC
c. RJ-45
d. ST
Answer: c. RJ-45scribd
When the angle of incidence at the boundary equals the critical angle, light:
a. Escapes into the cladding
b. Bends along the interface
c. Is absorbed
d. Is amplified
Answer: b. Bends along the interfaceexamradar
What is the main reason for slow adoption of fiber to the home (FTTH)?
a. Lack of standards
b. High installation costs
c. Low bandwidth
d. Low reliability
Answer: b. High installation costsscribd
In fiber, what is ‘chromatic dispersion’?
a. Variation in speed of different wavelengths
b. Excessive signal attenuation
c. Loss at splicing points
d. Absorption of light
Answer: a. Variation in speed of different wavelengthstestbook
Which fiber cable type is optimal for short-distance, high-capacity connections in data centers?
a. Single-mode
b. Multimode
c. Armored
d. Ribbon cable
Answer: b. Multimodescribd
What causes microbends in fiber cables?
a. Large-scale cable curves
b. Small, sharp deformations in the fiber
c. Core diameter misalignment
d. Incorrect refractive index
Answer: b. Small, sharp deformations in the fiberlastmomenttuitions
In fiber optic transmission, which light source provides higher efficiency for long-haul networks?
a. LED
b. Laser diode
c. Incandescent bulb
d. Mercury lamp
Answer: b. Laser diodetestbook
Which two types of fiber optic cable are most common in current networking environments?
a. Shielded and Unshielded
b. Red and Green
c. Singlemode and Multimode
d. Star and Mesh
Answer: c. Singlemode and Multimodewayground
Which loss occurs due to the absorption of energy within the fiber material?
a. Modal loss
b. Bending loss
c. Absorption loss
d. Splice loss
Answer: c. Absorption lossdiscountpdh
What is the function of a fiber optic transceiver?
a. Convert electrical signals to optical signals and vice versa
b. Splice fibers together
c. Provide mechanical protection
d. Amplify signal strength
Answer: a. Convert electrical signals to optical signals and vice versafluxlight
Which cable type is most vulnerable to external magnetic fields?
a. Coaxial cable
b. Twisted pair
c. Optical fiber
d. Ribbon cable
Answer: b. Twisted pairtestbook
FTTC refers to deployment of fiber cables to the:
a. Home
b. Premises
c. Curb (a distribution point)
d. Antenna
Answer: c. Curb (a distribution point)scribd
Which phenomenon must be managed to reduce signal loss at fiber splices?
a. Modal dispersion
b. Reflection loss
c. Insertion loss
d. Attenuation
Answer: c. Insertion losslastmomenttuitions
Fiber optic distribution hubs provide:
a. Central point for managing cables
b. Continuous power supply
c. Emergency backup
d. Bandwidth allocation
Answer: a. Central point for managing cablesscribd
Which device aggregates traffic in an optical access network?
a. Splitter
b. OLT
c. ONT
d. Hub
Answer: b. OLTscribd
What is the main security risk in FTTH networks?
a. Malware
b. Physical tapping and unauthorized signal interception
c. Electromagnetic interference
d. Data corruption due to fiber aging
Answer: b. Physical tapping and unauthorized signal interceptionscribd
The full-mesh configuration in fiber networks is:
a. Simple
b. Complex
c. Slow
d. Obsolete
Answer: b. Complexlastmomenttuitions
Electrical devices, when present in an optical network, are mainly used for:
a. Signal control
b. Signal generation
c. Data encryption
d. Fiber splicing
Answer: a. Signal controllastmomenttuitions

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