Description : A SONET system can use _________. A) STS multiplexers B) regenerators C) add/drop multiplexers D) all of theabove
Last Answer : add/drop multiplexers
Description : An STS multiplexer is a ______ device. A) one-layer B) two-layer C) three-layer D) four-layer
Last Answer : two-layer
Description : A ________ is a repeater. A) regenerator B) ADM C) STS multiplexer/demultiplexer D) none of the above
Last Answer : STS multiplexer/demultiplexer
Description : Which of the following does not allow multiple uses or devices to share one communication line? a. doubleplexer b. multiplexer c. concentrator d. controller
Last Answer : concentrator
Description : The simplest type of switching fabric is the ______ switch. A) crosspoint B) crossbar C) TSI D) STS
Last Answer : crossbar
Description : A ______is the end-to-end portion of the network between two STS multiplexers. A) section B) line C) path D) none of the above
Last Answer : path
Description : An STS-3 frameis madeof ________columns. A) 9 B) 90 C) 270 D) none of the above
Last Answer : none of the above
Description : An STS-3 frameis madeof ______ rows. A) 1 B) 9 C) 27 D) none of the above
Last Answer : 27
Description : An STS-1 frameis made______columns A) 1 B) 9 C) 90 D) none of the above
Last Answer : 90
Description : An STS-1 frameis madeof ________rows A) 1 B) 9 C) 90 D) none of the above
Last Answer : 1
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 : Compared to analog signals, digital signals A. allow faster transmission B. are moreaccurate C. both (a)and (b) D. All of theabove E. None of the above
Last Answer : both (a)and (b)
Description : A communications device that combines transmissions from several I/O devices into one line is a a. concentrator b. modifier c. multiplexer d. full-duplex line
Last Answer : multiplexer
Description : Which of the following might be used by a company to satisfy its growing communications needs? a. front end processor b. multiplexer c. controller d. concentrator e. all of the above
Last Answer : all of the above
Description : An add/drop multiplexer isa ______device. A) one-layer B) two-layer C) three-layer D) four-layer
Last Answer : three-layer
Description : A communication device that combines transmissions from several I/O devices into one line is a A) Concentrator B) Modifier C) Multiplexer D) Full duplex file
Last Answer : C) Multiplexer
Description : Which network component/s is/are involved in the Presentation layer of an OSI model? a. Gateway b. Multiplexer & Oscilloscope c. Amplifier & Hub d. All of the above
Last Answer : a. Gateway
Description : What is demultiplexers?
Last Answer : Demultiplexer is a combinational circuit. It can give multiple output from a single input. Demultiplexers can be made from AND gates. Demultiplexer perform the opposite function of multiplexer. The structure of demultiplexer is similar to decoder.
Description : Describe with example the use of insertion and extraction operators.
Last Answer : Insertion operator: The operator "" is called as extraction operator or get from extracts the value from keyboard and assigns it to the variable on its right. Extraction operator is used with cin statement to accept input from user (keyboard). Example: cin>>number1;
Description : In astar-topology Ethernet LAN, _______ is just a point where the signals coming from different stations collide; it is thecollision point. A) An activehub B) A passivehub C) either (a)or (b) D) neither (a) nor (b)
Last Answer : A passivehub
Description : Data from a computer are_______; the local loop handles _______ signals. A) analog; analog B) analog; digital C) digital; digital D) digital; analog
Last Answer : digital; analog
Description : Signals with a frequency below 2 MHz use _______ propagation. A) ground B) sky C) line-of-sight D) none of the above
Last Answer : ground
Description : _______ signals canhave only alimited number of values. A) Analog B) Digital C) (a) or (b) D) None of the above
Last Answer : Digital
Description : When irrigating a colostomy, the nurse lubricates the catheter and gently inserts it into the stoma no more than _______ inches a) 3 The nurse should insert the catheter no more than 3 inches. b ... and not recommended. d) 5 Insertion of the catheter 5 inches is excessive and not recommended.
Last Answer : a) 3” The nurse should insert the catheter no more than 3 inches.
Description : What is the device used in fiber optic communication which consist of a receiver transmitter use to clean up and amplify digital data moving in one direction and another in the opposite direction? A. Optic compressors B. Optic retarders C. Optic isolator D. Optic regenerators
Last Answer : D. Optic regenerators
Description : Coke oven regenerators are made of __________ bricks. (A) Fire clay (B) Silica (C) Low thermal conductivity (D) High electrical conductivity
Last Answer : (A) Fire clay
Description : Regenerators as compared to recuperators for the same duty(A) Store smaller quantity of waste heat (B) Are lighter & compact (C) Involve higher initial cost (D) All (A), (B) & (C)
Last Answer : (C) Involve higher initial cost
Description : Regenerators are normally provided in the (A) Glass melting furnace (B) Open hearth furnace (C) By product coke ovens (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Regenerators are installed in (A) Coke ovens (B) Open hearth furnace (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Regenerators are used for waste heat recovery in (A) By-product coke ovens (B) Beehive coke oven (C) Blast furnace stoves (D) Soaking pits
Last Answer : (A) By-product coke ovens
Description : Regenerators compared to the recuperators for the same duty (A) Occupy more space (B) Are less costly (C) Are of smaller size (D) All (A), (B) and (C)
Last Answer : (A) Occupy more space
Description : An important requirement for successful transmission system using light ∙ a. Powerful, reliable light source ∙ b. Strong glass ∙ c. Reliable, high cost transmission medium ∙ d. Powerful regenerators
Last Answer : a. Powerful, reliable light source
Description : A healthy 6 years-old child presents with carious maxillary second primary molar with a necrotic pulp. Which treatment would be preferred? A. Extraction B. Indirect pulp treatment C. ... normal exfoliation) D. Pulpectomy to preserve the tooth as a space manteiner. E. Antibiotic coverage
Last Answer : D. Pulpectomy to preserve the tooth as a space manteiner.
Description : Which of the following is form of semi conductor memory in which it is possible to change the contents of selected memory locations by applying suitable electrical signals? a. CAM b. ROM c. EPROM d. Abacus
Last Answer : EPROM
Description : The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as: a. modulation b. demodulation c. synchronizing d. digitising
Last Answer : digitising
Description : A traditional cable TV network transmits signals ______. A) upstream B) downstream C) upstream and downstream D) none of the above
Last Answer : downstream
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 : ___ 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 : Signals with a frequency above30 MHz use_______propagation. A) ground B) sky C) line-of-sight D) none of the above
Last Answer : line-of-sight
Description : Signals with a frequency between 2 MHz and 30 MHz use ______ propagation. A) ground B) sky C) line-of-sight D) none of the above
Last Answer : sky
Description : In ________, we combine signals from different sources to fit into a larger bandwidth. A) spread spectrum B) line coding C) block coding D) none of the above
Last Answer : spread spectrum
Description : _____ isan analog multiplexing technique to combine optical signals. A) FDM B) TDM C) WDM D) None of the above
Last Answer : WDM
Description : ______ can be applied whenthe bandwidth of a link (in hertz) is greater than the combined bandwidths of the signals to be transmitted. A) TDM B) FDM C) Both (a)or (b) D) Neither (a) or (b)
Last Answer : FDM
Description : Which multiplexing technique involves signals composed of light beams? A) FDM B) TDM C) WDM D) none of the above
Description : Which multiplexing technique transmits digital signals? A) FDM B) TDM C) WDM D) None of the above
Last Answer : TDM
Description : Which multiplexing technique transmits analog signals? A) FDM B) TDM C) WDM D) (a) and (c)
Last Answer : (a) and (c)
Description : _____ signals can have an infinite number of values ina range. A) Analog B) Digital C) (a) or (b) D) None of the above
Last Answer : Analog
Description : Signals can be ________. A) analog B) digital C) either (a)or (b) D) neither (a) nor (b)
Last Answer : either (a)or (b)
Description : Before data can be transmitted, they must be transformed to________. A) periodic signals B) electromagnetic signals C) aperiodic signals D) low-frequency sine waves
Last Answer : electromagnetic signals