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 : If the baudrate is400 for a QPSK signal, thebit rate is ________ bps. A) 100 B) 400 C) 800 D) 1600
Last Answer : 800
Description : If the bit rate for an FSK signal is1200 bps, thebaud rate is ________. A) 300 B) 400 C) 600 D) 1200
Last Answer : 1200
Description : f the bit rate for an ASK signal is1200 bps, thebaud rate is ________. A) 300 B) 400 C) 600 D) 1200
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 : An analog signal carries 4 bits in each signal unit. If 1000 signal units are sent per second, then baud rate and bit rate of the signal are ............... and .............. (A) 4000 bauds \ sec & ... (B) 2000 bauds \ sec & 1000 bps (C) 1000 bauds \ sec & 500 bps (D) 1000 bauds \ sec & 4000 bps
Last Answer : (D) 1000 bauds \ sec & 4000 bps Explanation: Bit rate is the number of bits per second. Baud rate is the number of signal units per second. Baud rate is less than or equal to the bit rate. Baud rate = 1000 bauds per second (baud/s) Bit rate = 1000 x 4 = 4000 bps
Description : In an IPv4 datagram, the M bit is 0, the value of HLEN is 10, the value of total length is 400 and the fragment offset value is 300. The position of the datagram, the sequence numbers of the ... 2789 b. First fragment, 2400 and 2759 c. Last fragment, 2400 and 2759 d. Middle fragment, 300 and 689
Last Answer : c. Last fragment, 2400 and 2759
Description : A device is sending out data at the rate of 2000 bps. How long does it take to send a file of 1,00,000 characters ? a. 50 b. 200 c. 400 d. 800
Last Answer : c. 400
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 : A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of ... is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500
Last Answer : a. 2500
Description : . The product of the bit rate and distance of a fiber-optic system is 2 Gbits-km/s. What is the maximum rate at 5 km? ∙ A. 100 Mbits/s ∙ B. 200 Mbits/s ∙ C. 400 Mbits/s ∙ D. 1000 Gbits/s
Last Answer : C. 400 Mbits/s
Description : The product of the bit rate and distance of a fiber-optic system is 2 Gbits km/s. What is the maximum rate at 5 km? ∙ a. 100 Mbits/s ∙ b. 200 Mbits/s ∙ c. 400 Mbits/s ∙ d. 1000 Gbits/s
Last Answer : c. 400 Mbits/s
Description : A multiplexer combines four 100-Kbps channels using a time slot of 2 bits. What is the bit rate? (A) 100 Kbps (B) 200 Kbps (C) 400 kbps (D) 1000 Kbps
Last Answer : (C) 400 kbps
Description : The data rate is sometimes calledthe ___ rate. A) baud B) bit C) signal D) none of the above
Last Answer : bit
Description : The signal rate is sometimes called the ____ rate. A) baud B) bit C) signal D) none of the above
Last Answer : baud
Description : The ________ rate defines thenumber of dataelements sent in1s; the______ rate is the numberof signalelements sent in 1s. A) data; signal B) signal; data C) baud; bit D) none of the above
Last Answer : data; signal
Description : What isanother name fora sharednetwork? A) WAP B) Switch C) Broadband router D) Hub
Last Answer : Hub
Description : IEEE hasdefined the specifications fora wireless LAN, called _______, whichcovers the physical and data link layers. A) IEEE 802.3 B) IEEE 802.5 C) IEEE 802.11 D) IEEE 802.2
Last Answer : IEEE 802.11
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 : The constellation diagram of16-QAM has ______ dots. A) 4 B) 16 C) 8 D) none of the above
Last Answer : 16
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 QAM,both ________ of acarrier frequencyare varied. A) frequencyand amplitude B) phase andfrequency C) amplitudeand phase D) none of the above
Last Answer : amplitudeand phase
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 : ________ is a virtual-circuit wide-area network that was designed in response to demands fora new type of WAN in thelate1980s and early 1990s. A) X.25 B) Frame Relay C) ATM D) none of the above
Last Answer : Frame Relay
Description : Suppose a digitized voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency (two samples per hertz). What is the bit rate required, if it ... sample requires 8 bits? (A) 32 kbps (B) 64 kbps (C) 128 kbps (D) 256 kbps
Last Answer : (C) 128 kbps
Description : An analog signal has a bit rate of 6000 bps and a baud rate of 2000 baud. How many data elements are carried by each signal element ? (A) 0.336 bits/baud (B) 3 bits/baud (C) 120,00,000 bits/baud (D) None of the above
Last Answer : (B) 3 bits/baud
Description : Which of the following is correct IPv4 address? a. 124.201.3.1.52 b. 01.200.128.123 c. 300.142.210.64 d. 128.64.0.0
Last Answer : d. 128.64.0.0
Description : The address of a class B host is to be split into subnets with a 6-bit subnet number. What is the maximum number of subnets and the maximum number of hosts in each subnet? a. 62 subnets and 262142 hosts. b. 64 subnets and 262142 hosts. c. 62 subnets and 1022 hosts. d. 64 subnets and 1024 hosts
Last Answer : c. 62 subnets and 1022 hosts.
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 : IPv6 has _______ -bit addresses. A. 32 B. 64 C. 128 D. Variable
Last Answer : C. 128
Description : What is the size of an IP address? A. 64 bit B. 128 bit C. 16 bit D. 32 bit
Last Answer : D. 32 bit
Description : The cheapest modems cantransmit A. 300 bits per second B. 1,200 bitsper second C. 2,400 bits per second D. 4,800 bits per second E. None of the above
Last Answer : 300 bits per second
Description : Avalanche photodiode receivers candetect hits of transmitted databy receiving A. 100 photons B. 200 photons C. 300 photons D. 400 photons E. None of the above
Last Answer : 200 photons
Description : Avalanche photodiode receivers can detect bits of transmitted data by receiving a. 100 photons b. 200 photons c. 2000 photons d. 300 photons
Description : SONET sends ________ frames per second A) 1000 B) 2000 C) 4000 D) 8000
Last Answer : 2000
Description : Find the current density of a material with resistivity 20 units and electric field intensity 2000 units. a) 400 b) 300 c) 200 d) 100
Last Answer : d) 100
Description : Infrared range for fiber optics ∙ a. 400 – 700 nm ∙ b. 700 – 1200 nm ∙ c. 300 – 2000 nm ∙ d. 400 – 7000 nm
Last Answer : b. 700 – 1200 nm
Description : Ram and Shyam started a business with investments of Rs.40000 and Rs.60000. At the end of one year, out of the total Ram got Rs.2000 less profit than Shyam. Find the total profit (in Rs.) a)12000 b)10000 c)8000 d)16000
Last Answer : b)10000
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 : If the shock says 1lb per 12000 gallon pool how many tablespoons for a 300 gallon spa?
Last Answer : It is 0.4 ounces.
Description : Two Pelton turbines A and B have the same specific speed and are working under the same head. Turbine A produces 400 kW at 1000 rpm. If turbine B produces 100kW, then its rpm is (a) 4000 (b) 2000 (c) 1500 (d) 3000
Last Answer : (b) 2000
Description : Commercial available medium size machines have a speed range of ______ . (a) 200 to 400 r.p.m. (b) 600 to 1000 r.p.m. (c) 1000 to 1500 r.p.m. (d) 2000 to 2500 r.p.m.
Last Answer : (d) 2000 to 2500 r.p.m.
Description : In IPv4, which field or bit value unambiguously identifies thedatagram as a fragment? A) Donot fragment bit ?0 B) More Fragment bit ?0 C) Fragment offset = 1000 D) noneof the above
Last Answer : Fragment offset = 1000