Description : The operation of the fiber-optic cable is based on the principle of a. Refraction b. Reflection c. Dispersion d. Absorption
Last Answer : b. Reflection
Description : The operation of a fiber-optic cable is based on the principle of ∙ A. refraction ∙ B. reflection ∙ C. dispersion ∙ D. absorption
Last Answer : A. refraction
Description : The operation of the fiber-optic cable is based on the principle of ∙ a. Refraction ∙ b. Reflection ∙ c. Dispersion ∙ d. Absorption
Last Answer : ∙ b. Reflection
Description : ______ cable consists of an inner copper core and asecond conductingouter sheath. A) Twisted-pair B) Coaxial C) Fiber-optic D) Shielded twisted-pair
Last Answer : Coaxial
Description : The HFC network uses _______ cable. A) twisted-pair B) coaxial C) fiber-optic D) acombination of (b) and (c)
Last Answer : fiber-optic
Description : ______ cables arecomposed ofa glass or plastic inner core surrounded by cladding, allencasedin an outside jacket. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Fiber-optic
Description : ……cables are composed of a glass or plastic inner core surrounded by cladding,all encased in an outside jacket. a. Fiber-optic b. Coaxial c. Shield Twisted Pair d. Unshield Twisted-pair
Last Answer : a. Fiber-optic
Description : When a beam of light travels through media of two different densities, if theangle of incidence isgreater than the critical angle, _______ occurs. A) reflection B) refraction C) incidence D) criticism
Last Answer : reflection
Description : Fiber optics cable used in communication, works on the principle of (1) regular reflection of light (2) diffuse reflection of light (3) refraction of light (4) total internal reflection of light
Last Answer : total internal reflection of light
Description : Which of the following performs modulation and demodulation? a. fiber optics b. satellite c. coaxial cable d. modem e. none of the above
Last Answer : modem
Description : Which of the following performs modulation and demodulation? a. fiber optics b. satellite c. coaxial cable d. Modem
Last Answer : d. Modem
Description : _____uses fiber-optic cable. A) 10Base5 B) 10Base2 C) 10Base-T D) 10Base-F
Last Answer : 10Base-F
Description : The traditional cable TV system used ________cable endto end. A) twisted-pair B) coaxial C) fiber-optic D) none of the above
Last Answer : coaxial
Description : ___ cable can carry signals ofhigher frequency ranges than_____ cable. A) Twisted-pair; fiber-optic B) Coaxial; fiber-optic C) Coaxial; twisted-pair D) none of the abov
Last Answer : Coaxial; twisted-pair
Description : ______ cable is used for voice and data communications. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Twisted-pair
Description : Which of the following is nota guided medium? A) twisted-pair cable B) coaxial cable C) fiber-optic cable D) atmosphere
Last Answer : atmosphere
Description : ____ is designed to use thehigh bandwidthcapabilityof fiber-optic cable. A) FDM B) TDM C) WDM D) None of the above
Last Answer : WDM
Description : The slowest transmissionspeeds are those of A. twisted-pair wire B. coaxial cable C. fiber-optic cable D. microwaves
Last Answer : twisted-pair wire
Description : S/NET is another kind of ………….network with an ………….for switching. A. fiber optic, active star B. active star , fiber optic C. twisted cable, active network D. active network, twisted cable
Last Answer : A. fiber optic, active star
Description : Consists of 2 conductors twisted round each other. a. Twisted pair cable b. Fiber optic cable c. Coaxial cable d. Microwave
Last Answer : a. Twisted pair cable
Description : Which of the following is not a guided medium? a. twisted-pair cable b. fiber-optic cable c. coaxial cable d. atmosphere
Last Answer : d. atmosphere
Description : ……….cable is used for voice and data communications. a. Twisted-pair b. None of These c. Coaxial d. Fiber-optic
Last Answer : a. Twisted-pair
Description : The local loop has _______ cablethat connects the subscriber telephonetothe nearest end office. A) twisted-pair B) coaxial C) fiber-optic D) none of the above
Last Answer : twisted-pair
Description : The core of a fiber optic cable is made of a. Air b. Glass c. Diamond d. Quartz
Last Answer : b. Glass
Description : The core of fiber-optic cable is surrounded by ∙ A. wire braid shield ∙ B. Keviar ∙ C. cladding ∙ D. plastic insulation
Last Answer : ∙ C. cladding
Description : The core of a fiber-optic cable is made of ∙ A. air ∙ B. glass ∙ C. diamond ∙ D. quartz
Last Answer : B. glass
Description : The core of a fiber optic cable is made of ∙ a. Air ∙ b. Glass ∙ c. Diamond ∙ d. Quartz
Description : Fiber optic cable operates near _______ frequencies. A. 800 THz B. 20 MHz C. 200 MHz D. 2 GHz
Last Answer : A. 800 THz
Description : The inner core ofan optical fiber is _______ in composition. A) glass or plastic B) copper C) bimetallic D) liquid
Last Answer : glass or plastic
Description : Another name for the cable TV office is the _______. A) splitter B) fiber node C) combiner D) head end
Last Answer : head end
Description : What type of modulation do most analog fiber optic communications systems use?
Last Answer : Intensity modulation.
Description : Optical fiber works on the A. principle of refraction B. total internal reflection C. scattering D. interference
Last Answer : B. total internal reflection
Description : The principle on which fiber optics is based is A. refraction C. polarization B. Dispersion. D. Total internal reflection
Last Answer : D. Total internal reflection
Description : _________uses two fiber-optic cables. A) 100Base-TX B) 100Base-FX C) 100Base-T4 D) none of the above
Last Answer : 100Base-FX
Description : ______ cables carry data signals in the form of light. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Fiber-opti
Description : __________ consists of a central conductor and a shield. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Description : ________cable consists of two insulated copper wires twistedtogether. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Description : A network that needs human beings to manually route signals is called.... A) Fiber Optic Network B) Bus Network C) T-switched network D) Ring network
Last Answer : C) T-switched network
Description : In an optical fibre the signal is transmitted – (1) in a straight line path (2) In a curved path (3) due to total internal reflection (4) Due to refraction
Last Answer : (3) due to total internal reflection Explanation: Total internal reflection is the basic concept be-hind the optical fiber. Optical fiber employs the transmission of light down fibers of plastic ... refractive index to allow more light to be guided along the fiber through total internal refraction.
Description : In an optical fibre the signal is transmitted (1) in a straight line path (2) In a curved path (3) due to total internal reflection (4) Due to refraction
Last Answer : due to total internal reflection
Description : An ______signal is the optical modulation of an STS-n (or STM-n) signal. A) OC-n B) TDM-n C) FDM-n D) none of the above
Last Answer : TDM-n
Description : Bits can be sent over guided and unguided media as analog signal by ___________ a. digital modulation b. amplitude modulation c. frequency modulation d. phase modulation
Last Answer : a. digital modulation
Description : A noise where foreign signal enters the path of the transmitted signal is called …… A. Impulse B. Inter modulation C. cross talk D. both b and c
Last Answer : C. cross talk
Description : The core of the optical fiber has ______. A. A medium index of refraction B. A lower index of refraction than the cladding C. A lower index of refraction than air D. A higher index of refraction than the cladding
Last Answer : D. A higher index of refraction than the cladding
Description : The different angles of entry of light into an optical fiber when the diameter of the core is many times the wavelength of the light transmitter is known as ________. A. refraction B. sensor C. mode D. emitter
Last Answer : C. mode
Description : The core of a fiber optic is surrounded by a. Wire braid shield b. Kevlar c. Cladding d. Plastic insulation
Last Answer : c. Cladding
Description : The core of a fiber optic is surrounded by ∙ a. Wire braid shield ∙ b. Kevlar ∙ c. Cladding ∙ d. Plastic insulation
Last Answer : ∙ c. Cladding
Description : _______ is the transmission of sound from one room to an adjacent room thru common walls, floors or ceilings. A. Reverberation B. Refraction C. Flanking transmission D. Reflection
Last Answer : C. Flanking transmission
Description : The white light after falling on prism gets split into seven colours due to _______ of light. a) reflection b)refraction c)dispersion d)bend
Last Answer : c)dispersion
Description : Inan HFC network, the upstream data are modulated using the _______ modulation technique. A) QAM B) QPSK C) PCM D) ASK
Last Answer : QPSK