Description : Which multiplexing technique transmits digital signals? A) FDM B) TDM C) WDM D) None of the above
Last Answer : TDM
Description : _____ isan analog multiplexing technique to combine optical signals. A) FDM B) TDM C) WDM D) None of the above
Last Answer : WDM
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 analog signals? A) FDM B) TDM C) WDM D) (a) and (c)
Last Answer : (a) and (c)
Description : _____ isa digitalprocess that allows several connections to share thehighbandwidth ofa link. A) FDM B) TDM C) WDM D) None of the above
Description : Time synchronization is necessary in (A) FDM. (B) TDM. (C) WDM. (D) Quadrature multiplexing
Last Answer : (B) TDM.
Description : Which multiplexing technique shifts each signal to a different carrier frequency? A) FDM B) TDM C) Both (a)and (b) D) None of the above
Last Answer : FDM
Description : Given the following statements: (a) Frequency Division Multiplexing is a technique that can be applied when the bandwidth of a link is greater than combined bandwidth of signals to be transmitted. (b) Wavelength Division Multiplexing (WDM) ... c) is true. (D) (a), (b) and (d) are true; (c) is false.
Last Answer : (D) (a), (b) and (d) are true; (c) is false.
Description : We candivide ____ into two different schemes: synchronousor statistical. A) FDM B) TDM C) WDM D) none of the above
Description : ____ is designed to use thehigh bandwidthcapabilityof fiber-optic cable. A) FDM B) TDM C) WDM D) None of the above
Description : Using_________each connected device is assigned a time slot whether or not the device has any thing to send. (A) WDM (B) FDM (C) TDM (D) STDM
Last Answer : (C) TDM
Description : DMT is a modulation technique that combineselements of _______ and _______. A) FDM; TDM B) QDM; QAM C) FDM; QAM D) PSK; FSK
Last Answer : FDM; QAM
Description : The ______ technique expands the bandwidthof a signal by replacing each data bit with n bits. A) FDM B) DSSS C) FHSS D) TDM
Last Answer : DSSS
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 : Which of the following is oldest multiplexing scheme? A. Frequency Division Multiplexing (FDM) B. Time Division Multiplexing (TDM) C. Code Division Multiplexing (CDM) D. Space Division Multiplexing (SDM)
Last Answer : D. Space Division Multiplexing (SDM)
Description : Multiplexing scheme use by baseband transmission. A. FDM B. Space multiplexing C. TDM D. Statistical multiplexing
Last Answer : C. TDM
Description : Demodulation is the process of A. converting digital signals toanalog signals B. converting analogsignals todigital signals C. combining many low speed channels into onehigh speed channel D. dividing the high-speed signals into frequency bands E. None of the above
Last Answer : converting analogsignals todigital signals
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 : A single channel is shared by multiple signals by _____ a. analog modulation b. digital modulation c. multiplexing d. phase modulation
Last Answer : c. multiplexing
Description : WDM stands for ____________________-division multiplexing.
Last Answer : Wavelength
Description : One of the reasons why FDM is being replaced by TDM is A. noise is amplified with voice when an FDM system is used B. it is difficult to place channels side by side C. there is more time than frequency D. Most available frequencies has been used
Last Answer : A. noise is amplified with voice when an FDM system is used
Description : Compare FDM & TDM systems
Last Answer : Sr. No. FDM TDM 1 Divides the channel into the two or more frequency ranges that do not overlap. Divides and allocates certain Time periods to each channel. 2 Code word is ... Needs guard bands Needs guard time 4 Problem of crosstalk No problem of crosstalk
Description : A good example of a pilot tone system used in commercial frequency modulation stations. A. FDM B. Time division C. Stereo multiplexing D. Frequency modulation
Last Answer : C. Stereo multiplexing
Description : FDM stands for: a) Frequency Division Multiplexing b) Fidelty Division Multiplexing c) Fast Division Multiplexing d) None of These
Last Answer : a) Frequency Division Multiplexing
Description : An FDM hierarchy which is formed by frequency – division multiplexing 10 super groups together for a combined capacity of 600 voice band message channels.
Last Answer : Mastergroup
Description : An FDM hierarchy which is formed by frequency – division multiplexing five groups containing 12 channels each for a combined bandwidth of 240 kHz
Last Answer : Supergroup
Description : TDM stands for: a) Task Division Multiplexing b) Time Division Multiplexing c) Testing Division Multiplexing d) None of These
Last Answer : b) Time Division Multiplexing
Description : Modulation is theprocessof A. converting analogsignals todigital signals B. converting digital signals toanalog signals C. Multiplexing various signals intohigh speed line signals D. performing data encryption
Last Answer : converting digital signals toanalog signals
Description : Demodulation is aprocessof A. converting analog to digital signals B. converting digital to analogsignals C. multiplexing various signals intoone high speed line signals D. performing data description
Last Answer : converting analog to digital signals
Description : ________ is a technique that is used to send more than one call over a single line. a) Digital transmission b) Infrared transmission c) Digitizing d) Multiplexing e) None of these
Last Answer : d) Multiplexing
Description : In synchronous TDM, forn signal sources of the same data rate, eachframe contains _______ slots. A) n B) n + 1 C) n- 1 D) 0to n
Last Answer : n
Description : Four channels are multiplexed using TDM. If each channel sends 100 bytes/second and we multiplex 1 byte per channel, then the bit rate for the link is __________. a. 400 bps b. 800 bps c. 1600 bps d. 3200 bps
Last Answer : d. 3200 bps
Description : If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ______. a. 64 Kbps b. 32 Mbps c. 32 Kbps d. 64 MbpS
Last Answer : c. 32 Kbps
Description : _____ is an ideaor concept that isa precursor to an Internet standard. A) RCF B) RFC C) ID D) none of the above
Last Answer : RCF
Description : State two advantages of WDM technique.
Last Answer : ADVANTAGES OF WDM: 1. WDM has enhanced capacity. 2. WDM can be used for full duplex transmission with a single fiber. 3. It is inherently easier to reconfigure (addition or ... use optical components which are simpler and more reliable and often less costly than their electronic counterparts
Description : Which of the following statement is incorrect? A. The Addresses Resolution Protocol, ARP, allows a host to find the physicaladdress ofa target host on the samephysical network, given only the target IP address. ... -addresses of our choice to every machine. D. All of theabove E. None of the above
Last Answer : All of theabove
Description : In ________ TDM, slots are dynamically allocated to improvebandwidth efficiency. A) synchronous B) statistical C) isochronous D) none of the above
Last Answer : statistical
Description : In ________ TDM, each input connection hasan allotment in the outputeven if it is not sendingdata. A) synchronous B) statistical C) isochronous D) none of the above
Last Answer : synchronous
Description : In TDM, the transmissionrate of the multiplexed path isusually_______ thesum of thetransmission rates of thesignal sources. A) greater than B) less than C) equal to D) not related to
Last Answer : greater than
Description : SONET is a _______ TDM system. A) asynchronous B) synchronous C) statistical D) none of the above
Last Answer : none of the above
Description : _______ is designed to be usedin wirelessapplications in which stations must be ableto sharethe medium without interception by an eavesdropperand without beingsubject tojamming from a malicious intruder. A) Spread spectrum B) Multiplexing C) Modulation D) None of the above
Last Answer : Spread spectrum
Description : ________is the set of techniques that allows the simultaneous transmission of multiple signalsacrossa single data link. A) Demodulating B) Multiplexing C) Compressing D) None of the above
Last Answer : Multiplexing
Description : ________ can beachievedbyusing multiplexing; ______ canbe achieved by using spreading. A) Efficiency; privacy and antijamming B) Privacyand antijamming;efficiency C) Privacyand efficiency; antijamming D) Efficiency and antijamming; privacy
Last Answer : Efficiency; privacy and antijammin
Description : The sharing of a medium and its link by two or more devices is called _______. A) modulation B) encoding C) line discipline D) multiplexing
Last Answer : multiplexing
Description : In ATM, the ______ layerprovides routing, traffic management, switching, and multiplexing services. A) physical B) ATM C) AAL D) none of the above
Last Answer : ATM
Description : What are the functions of the transport layer? a. Multiplexing/ Demultiplexing b. Connection less Services c. Connection oriented service d. Congestion control
Last Answer : a. Multiplexing/ Demultiplexing
Description : Adding bits to synchronize one digital signal to another is called: a. bit stuffing b. bit-synch c. SDH d. WDM
Last Answer : a. bit stuffing
Description : It is the most prevalent encoding technique used for TDM signals:
Last Answer : PCM
Description : Explain TDM technique with relevant diagram.
Last Answer : TIME DIVISION MULTIPLEXING (TDM): TDM is a digital multiplexing technique in which many signals are transmitted for very short time (time slot) over common transmission channel. Here each signal ... sample (or word) synchronization is necessary to properly separate the samples within each frame.
Description : A set of information that defines the status of resources allocated to a process is a. Process control b. ALU c. Register Unit d. Process description
Last Answer : Process description