Description : _______uses two optical fibers anda long-wavelaser source. A) 1000Base-SX B) 1000Base-LX C) 1000Base-T D) none of the above
Last Answer : 1000Base-LX
Description : _________ uses four twisted pairs. A) 1000Base-SX B) 1000Base-LX C) 1000Base-T D) none of the above
Last Answer : 1000Base-T
Description : 1000Base-SX, 1000Base-LX, and 1000Base-CX use _________ block coding and ________ line coding. A) 4B/5B; NRZ B) 8B/10B; NRZ C) 4B/5B; MLT-3 D) 8B/10B; NRZ
Last Answer : 8B/10B; NRZ
Description : IEEE 802.3ab defines Gigabit Ethernet transmission over unshielded twisted pair (UTP) category 5, 5e or 6 cabling known as .................... a. 1000 BASE-T b. 1000 BASE-SX c. 1000 BASE-LX d. 1000 BASE-CX
Last Answer : a. 1000 BASE-T
Description : IEEE 802.3ab defines Gigabit Ethernet transmission over unshielded twisted pair (UTP) category 5, 5e or 6 cabling known as .................... A) 1000 BASE-T B) 1000 BASE-SX C) 1000 BASE-LX D) 1000 BASE-CX
Last Answer : A) 1000 BASE-T
Description : 1000Base-T uses________line coding. A) 4D-PAM5 B) 8B6T C) MLT-3 D) Manchester
Last Answer : 4D-PAM5
Description : Which of the following are Gigabit Ethernets? A) 1000 BASE-SX B) 1000 BASE-LX C) 1000 BASE-CX D) All of above
Last Answer : D) All of above
Description : Which of the following are Gigabit Ethernets? A) 1000 BASE-SX B) 1000 BASE-LX C) 1000 BASE-CX D) All of the above
Last Answer : D) All of the above
Description : The ______ layer is responsible for the movementof a signal from its optical source to its optical destination. A) section B) line C) path D) photonic
Last Answer : line
Description : Which type of optical splitter (Y-coupler or T-coupler) splits only a small amount of power from the input fiber to one of the output fibers?
Last Answer : T-coupler
Description : Which of the printers used in conjunction with computers uses dry ink power? a. Daisy wheel printer b. Line printer c. Laser printer d. Thermal printer
Last Answer : Laser printer
Description : Which of the following uses a very thin glass or plastic fiber through which pulses of light travel? a. Cat 1 b. Optical fiber c. Twisted pair d. Coax
Last Answer : b. Optical fiber
Description : Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory (A) (wx /wy ) = (ly /lx ) (B) (wx/wy) = (ly/lx)² (C) (wx /wy ) = (ly /lx )4 (D) None of these
Last Answer : Answer: Option C
Description : Is the T-Mobile SideKick LX Cyber Cell Phone Case waterproof?
Last Answer : T-Mobile SideKick LX Cyber Cell Phone Case is water resistant not water proof.
Description : Which type of fiber optic connector (butt-jointed or expanded beam) brings the prepared ends of two optical fibers into close contact?
Last Answer : Butt-jointed connectors.
Description : What are the two basic types of optical fibers?
Last Answer : Multimode and single mode fibers.
Description : Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury
Last Answer : ANSWER: A
Description : Optical Fiber Optical fibers are the fine strands of _____. A. Glass B. Iron C. Calcium D. Mercury
Description : What is the basic fiber cleaving technique for preparing optical fibers for coupling?
Last Answer : Score-and-break.
Description : Which semiconductor sources (LD or LED) emit more focused light and are capable of launching sufficient optical power into both single mode and multimode fibers?
Last Answer : LDs.
Description : List the three techniques used by manufacturers to buffer optical fibers.
Last Answer : Tight-buffered, loose-tube, and gel-filled loose-tube.
Description : List three benefits that properly cabled optical fibers provide.
Last Answer : a. Protect optical fibers from damage or breakage during installation and over the fiber's lifetime. b. Provide stable fiber transmission characteristics compared with uncabled fibers. c. Maintain the physical integrity of the optical fiber.
Description : List the types of materials used in fabricating low-loss, long wavelength optical fibers.
Last Answer : Heavy-metal fluorides, chalcogenide glasses, and crystalline materials.
Description : Multimode optical fibers can have a step-index or graded index refractive index profile. Which fiber, multimode step-index or multimode graded-index fiber, usually performs better?
Last Answer : Multimode graded-index fiber
Description : A mode filter is a device that attenuates specific modes propagating in the core of an optical fiber. What mode propagating along single mode fibers do mode filters eliminate?
Last Answer : Second-order mode.
Description : Will an optical fiber's attenuation coefficient vary with changes in wavelength?
Last Answer : Yes.
Description : Optical fibers or cables should never be bent at a radius of curvature smaller than a certain value. Identify this radius of curvature
Last Answer : Minimum bend radius.
Description : How can loss be reduced during construction (or fabrication) of optical fibers?
Last Answer : By removing the impurities from optical fiber.
Description : Optical fibers for telecommunications are typically about _____ mils thick and consists of a glass core, a glass cladding of lower index of refraction, and a protective coating ∙ a. 5 ∙ b. 6 ∙ c. 7 ∙ d. 8
Last Answer : ∙ a. 5
Description : The ultrapure glass used to manufacture optical fibers is approximately ___pure ∙ a. 99.9 % ∙ b. 99.99 % ∙ c. 99.999 % ∙ d. 99.9999 %
Last Answer : d. 99.9999 %
Description : Unlike coax and twisted pair, optical fibers are immune to a. High-frequency transmission b. Signal attenuation c. Power loss d. Electromagnetic interference
Last Answer : Unlike coax and twisted pair, optical fibers are immune to Electromagnetic interference
Description : Light travels along optical fibers by
Last Answer : Light travels along optical fibers by Total internal reflection
Description : ______ is based oncoding theory and uses sequencesof numbers called chips. A) FDMA B) TDMA C) CDMA D) none of the above
Last Answer : CDMA
Description : The ______ scheme uses three levels (+V, 0, and-V) andthree transition rules to move betweenthe levels. A) 4B5B B) 2B1Q C) MLT-3 D) none of the above
Last Answer : MLT-3
Description : ______ isa standard developed by ITU-T. A) SONET B) SDH C) either (a) or (b) D) neither (a) nor (b)
Last Answer : either (a) or (b)
Description : ______ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T. A) X.25 B) Frame Relay C) ATM D) none of the above
Last Answer : ATM
Description : _________ uses thin coaxial cable. A) 10Base5 B) 10Base2 C) 10Base-T D) 10Base-F
Last Answer : 10Base2
Description : A switchin a datagram network uses arouting tablethat is based on the ______address. A) source B) destination C) local D) none of the above
Last Answer : destination
Description : The _______ technique uses M different carrier frequencies that are modulated by the source signal. At one moment, the sign modulates one carrier frequency; at the next moment, thesignal modulates another carrier frequency. A) FDM B) DSSS C) FHSS D) TDM
Last Answer : FHSS
Description : The Multicast Open Shortest Path First (MOSPF)protocol is an extension of the OSPF protocol that uses multicast routing to create source-based trees. The protocol is basedon _______ routing. A) distancevector B) link state C) path vector D) none of the above
Last Answer : link state
Description : Multicast link state routing uses the _______ tree approach. A) source-based B) group-shared C) a or b D) none of the above
Last Answer : source-based
Description : In virtual circuit network each packet contains ___________ a. full source and destination address b. a short VC number c. only source address d. only destination address
Last Answer : b. a short VC number
Description : In virtual circuit network each packet contains ___________ A. full source and destination address B. a short VC number C. only source address D. only destination address
Last Answer : B. a short VC number
Description : Which of the following produces the best quality graphics reproduction? a. Laser printer b. Ink jet printer c. Plotter d. Dot matrix printer
Last Answer : Plotter
Description : Which of the following printers are you sure will not to use if your objective is to print on multi carbon forms? a. Daisy wheel b. Dot matrix c. Laser d. Thimble
Last Answer : Laser
Description : Which printer is very commonly used for desktop publishing? a. Laser printer b. Inkjet printer c. Daisywheel printer d. Dot matrix printer
Description : A kind of serial dot-matrix printer that forms characters with magnetically-charged ink sprayed dots is called a. Laser printer b. Ink-jet printer c. Drum printer d. Chan printer
Last Answer : Ink-jet printer