Description : The constellation diagram of QPSK has ______ dots. A) 2 B) 1 C) 4 D) none of the above
Last Answer : 4
Description : Which address could be the beginningaddress of ablock of16 classless addresses? A) 2.4.6.5 B) 2.4.6.15 C) 2.4.6.62 D) none of the above
Last Answer : none of the above
Description : The constellation diagram of BPSK has ______dots. A) 2 B) 1 C) 0 D) none of the above
Last Answer : 2
Description : The constellation diagram of BASK has ______dots. A) 2 B) 1 C) 0 D) none of the above
Description : A constellation diagram shows us the __________ of a signal element, particularly when we areusing twocarriers (one in-phase and one quadrature). A) amplitudeand phase B) amplitudeand frequency C) frequencyand phase D) none of the above
Last Answer : amplitudeand phase
Description : Inan HFC network, the upstream data are modulated using the _______ modulation technique. A) QAM B) QPSK C) PCM D) ASK
Last Answer : QPSK
Description : Inan HFC network, the downstream data are modulated using the _______ modulation technique. A) PSK B) QAM C) PCM D) ASK
Last Answer : QAM
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 : Which of the following is not an analog-to-analog conversion? A) AM B) PM C) FM D) QAM
Description : _______ uses twocarriers, onein-phase andthe otherquadrature. A) ASK B) PSK C) FSK D) QAM
Description : Quadrature amplitude modulation(QAM) isa combination of ___________. A) ASK and FSK B) ASK and PSK C) PSK and FSK D) none of the above
Last Answer : ASK and PSK
Description : In________, the phase of thecarrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant. A) ASK B) PSK C) FSK D) QAM
Last Answer : PSK
Description : In_________, the frequencyof the carrier signal is varied to representdata. Both peak amplitudeand phase remain constant. A) ASK B) PSK C) FSK D) QAM
Last Answer : FSK
Description : In________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remainconstant. A) ASK B) PSK C) FSK D) QAM
Last Answer : ASK
Description : If the baudrate fora 64-QAM signal is 2000, what is the bit rate? A) 300 B) 400 C) 1000 D) 12000
Last Answer : 12000
Description : If the bit rate for a16-QAM signal is 4000 bps, what is the baudrate? A) 300 B) 400 C) 1000 D) 1200
Last Answer : 1000
Description : In QAM,both ________ of acarrier frequencyare varied. A) frequencyand amplitude B) phase andfrequency C) amplitudeand phase D) none of the above
Description : ASK, PSK, FSK,and QAM are examples of________conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digital
Last Answer : digital-to-analog
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
Description : The output quality of a printer is measured by a. Dot per inch b. Dot per sq. inch c. Dots printed per unit time d. All of above
Last Answer : Dot per sq. inch
Description : The Internet addresses are ______ bits in length in IPV4 addressing scheme A. 16 B. 64 C. 32 D. 48
Last Answer : C. 32
Description : In an electron dot diagram of potassium There is one dot. In an electron dot diagram of silicon there are four dots. Which element would you expect to be more reactive?
Last Answer : silicon
Description : What is represented by the solid dots within components 'B' and 'C' of the diagram shown in the illustration? (See illustration EL-0081) EL-0081 A. The fact that these parts are subject to wear and ... only. C. The particular components contain a gas such as neon or argon. D. All of the above.
Last Answer : Answer: C
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 : The effective rate at which transmission happens over a rate 2/3 Convolutional Coded, 512-QAM system is?
Last Answer : In telecommunications , orthogonal frequency-division multiplexing ( OFDM ) is a type of digital transmission and a method of encoding digital data on multiple carrier frequencies. OFDM has ... total data rates similar to conventional single-carrier modulation schemes in the same bandwidth.
Description : The modulation technique used by GSM cellular system A. Phase shift keying B. Frequency shift keying C. Gaussian minimum shift keying D. QAM
Last Answer : C. Gaussian minimum shift keying
Description : Modulation in which no signal is present between pulses A. Pulse modulation B. QAM C. PSK D. FSK
Last Answer : A. Pulse modulation
Description : The sinusoidal carrier is pulsed so that one of the binary states is represented by a carrier while the other is represented by its absence. A. FSK B. ASK C. PSK D. QAM
Last Answer : B. ASK
Description : IS-95 uses which modulation technique? a) GMSK b) BPSK c) QAM d) AFSK
Last Answer : b) BPSK
Description : Which quantizationlevel results ina more faithful reproduction of the signal? A) 2 B) 8 C) 16 D) 32
Last Answer : 32
Description : The VPIof an NNI is _______ bits in length. A) 8 B) 12 C) 16 D) 24
Last Answer : 12
Description : The VPIof a UNI is _______ bits in length. A) 8 B) 12 C) 16 D) 24
Last Answer : 8
Description : An IPv6address can haveup to __________ hexadecimal digits. A) 16 B) 32 C) 8 D) none of the above
Description : An IPv6address consistsof ________bytes (octets); A) 4 B) 8 C) 16 D) none of the above
Last Answer : 16
Description : What is the default mask for class C in CIDR notation? A) /24 B) /8 C) /16 D) none of the above
Last Answer : /8
Description : What is the default mask for class B in CIDR notation? A) /9 B) /8 C) /16 D) none of the above
Last Answer : (C) /16
Description : What is the default mask for class A in CIDR notation? A) /9 B) /8 C) /16 D) none of the above
Description : An organization isgranteda block of classless addresses with the starting address 199.34.32.0/27. How many addresses are granted? A) 8 B) 16 C) 32 D) none of the above
Description : An organization isgranteda block of classless addresses with the starting address 199.34.76.128/29. How manyaddressesare granted? A) 8 B) 16 C) 32 D) none of the above
Description : An organization isgranteda block of classless addresses with the starting address 199.34.76.64/28. How manyaddresses are granted? A) 8 B) 16 C) 32 D) none of the above
Description : An ICMP message has _____ headerand a variable-size data section. A) a 16-byte B) a 32-byte C) an 8-byte D) noneof the above
Last Answer : an 8-byte
Description : On a class B network, how manyhostsare availableat eachsite witha subnet mask of 248? A. 16,382 B. 8,190 C. 4,094 D. 2,046 E. 1,022
Last Answer : 2,046
Description : What is the usualnumber of bits transmitted simultaneously inparalleldata transmission used by microcomputers? A. 16 B. 9 C. 8 D. 4 E. None of the above
Last Answer : 9
Description : What is the size of the ‘total length’ field in IPv4 datagram? a. 4 bit b. 8 bit c. 16 bit d. 32 bit
Last Answer : c. 16 bit
Description : The ASCII encoding of binary data is called a. base 64 encoding b. base 32 encoding c. base 16 encoding d. base 8 encoding
Last Answer : a. base 64 encoding
Description : The next header t is an _____ field of Authentication Header that identifies the type of what follows. A. 16-bit B. 64-bit C. 8-bit D. 32-bit
Last Answer : C. 8-bit
Description : Length of Port address in TCP/IP is A. 8 bit long B. 4 bit long C. 32 bit long D. 16 bit long
Last Answer : D. 16 bit long
Description : Length of Port address in TCP/IP is a. 8 bit long b. 4 bit long c. 32 bit long d. 16 bit long
Last Answer : d. 16 bit long
Description : In IEEE 802.11, the MAC layer framehas ______ fields. A) four B) five C) six D) none of the above
Last Answer : four
Description : In IEEE 802.11, the ______ is a timerused for collision avoidance. A) NAV B) BSS C) ESS D) none of the above
Last Answer : NAV