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Recent questions tagged computer-networks

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2011
ISRO 2011-ECE COmputer Networks
The critical angle of an optical fiber is given by __________ where n1 is refractive index of medium 1 and n2 is the refractive index of medium 2 a) $sin^{-1} $(n2/n1) b) $sin^{-1} $(n1/n2) c) $sin^{-1} $(n2*n1) d) $sin^{-1} $ n2
The critical angle of an optical fiber is given by __________ where n1 is refractive index of medium 1 and n2 is the refractive index of medium 2a) $sin^{-1} $(n2/n1)b) $...
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2012
ISRO 2011-ECE Computer networks
The modulation normally used with digital data is a) AM b) FM c) SSB d) QPSK
The modulation normally used with digital data isa) AMb) FMc) SSBd) QPSK
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2013
ISRO 2011-ECE Computer Networks
In satellite communication, frequency modulation is used because satellite channel has a. High Modulation index b. Small bandwith and negligible noise c. Large bandwidth and severe noise d. Maximum Bandwidth and Minimum noise
In satellite communication, frequency modulation is used because satellite channel hasa. High Modulation indexb. Small bandwith and negligible noisec. Large bandwidth and...
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2014
ISRO 2011-ECE Networks
The channel capacity under the Gaussian noise environment for a discrete memory less channel with a bandwidth of 4 MHz and SNR 31 is a. 20 Mbps b. 4 Mbps c. 8 Kbps d. 4 Kbps
The channel capacity under the Gaussian noise environment for a discrete memory less channel with a bandwidth of 4 MHz and SNR 31 isa. 20 Mbpsb. 4 Mbpsc. 8 Kbpsd. 4 Kbps
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1 answer
2015
Teaching Recruitment Board, Tamilnadu
A system send 15 packets, each of size 1000 bits over a 1Mbps channel with 20ms RTT. The utilization percentage of the channel is:
A system send 15 packets, each of size 1000 bits over a 1Mbps channel with 20ms RTT. The utilization percentage of the channel is:
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1 votes
0 answers
2016
ISRO2012-ECE Networks
Following constellation diagram represents: $16$ PSK $16$ QAM $16$ APSK All the above
Following constellation diagram represents:$16$ PSK$16$ QAM$16$ APSKAll the above
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1 votes
1 answer
2017
ISRO2014-ECE : Network
In satellite communication, scrambling is mainly used for: Clock recovery Encryption limiting power spectral density bandwidth efficiency
In satellite communication, scrambling is mainly used for:Clock recoveryEncryptionlimiting power spectral densitybandwidth efficiency
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1 votes
1 answer
2019
ISRO2014-ECE Computer Networks
In a fiber-optic cable, which phenomenon occurs for signal to propagate along the inner core: Modulation Reflection Refraction All of the above
In a fiber-optic cable, which phenomenon occurs for signal to propagate along the inner core:ModulationReflectionRefractionAll of the above
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2 votes
1 answer
2021
ISRO2015-EC Computer networks
A communication channel is having a bandwidth of $3000$ Hz. The transmitted power is such that the received Signal-to-Noise ratio is $1023.$ The maximum data rate that can be transmitted error-free through the channel is: $3$ Kbps $3$ Mbps $30$ Kbps $300$ Kbps
A communication channel is having a bandwidth of $3000$ Hz. The transmitted power is such that the received Signal-to-Noise ratio is $1023.$ The maximum data rate that ca...
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0 votes
1 answer
2023
FTP vs HTTP: Computer networks
A user clicks on a link on a website to download a file. Which application layer protocol is/are being used FTP HTTP a. 1 only b. 2 only c. both 1 and 2 d. neither 1 nor 2
A user clicks on a link on a website to download a file. Which application layer protocol is/are being usedFTPHTTPa. 1 onlyb. 2 onlyc. both 1 and 2d. neither 1 nor 2
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1 votes
0 answers
2025
ISRO2015-ECE Networks
Which of the following modulation scheme requires minimum power for transmission? QPSK $16$-QAM $8$-PSK $64$-QAM
Which of the following modulation scheme requires minimum power for transmission?QPSK$16$-QAM$8$-PSK$64$-QAM
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1 votes
2 answers
2026
ISRO2016-ECE Networks
A typical optical fiber has high refractive index core & low refractive index cladding Low refractive index core & high refractive index cladding Uniform refractive index core surrounded by variable refractive index cladding None of the above
A typical optical fiber hashigh refractive index core & low refractive index claddingLow refractive index core & high refractive index claddingUniform refractive index co...
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1 votes
1 answer
2027
ISRO2016-ECE Networks
Hamming codes are used for Burst error correction Signal error correction Both (a) and (b) None of the above
Hamming codes are used forBurst error correctionSignal error correctionBoth (a) and (b)None of the above
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1 votes
1 answer
2028
ISRO2016-ECE Networks
An FM signal at $10.7$ MHz IF needs to be digitized for demodulation in a digital domain. If the bandwidth of this signal is $200$ kHz, the maximum usable sampling frequency is $200$ kHz $600$ kHz $400$ kHz $800$ kHz
An FM signal at $10.7$ MHz IF needs to be digitized for demodulation in a digital domain. If the bandwidth of this signal is $200$ kHz, the maximum usable sampling freque...
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44 votes
3 answers
2032
GATE CSE 2017 Set 2 | Question: 20
The maximum number of $\textsf{IPv4}$ router addresses that can be listed in the record route (RR) option field of an $\textsf{IPv4}$ header is______.
The maximum number of $\textsf{IPv4}$ router addresses that can be listed in the record route (RR) option field of an $\textsf{IPv4}$ header is______.
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