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REDES DE COMPUTADORAS

REDES DE COMPUTADORAS

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Suppose you send a package with 26 Blu-ray disks (each disk stores $100 \times 10^9$ 100 \times 10^9 bytes) from Puerto Rico to New York in 3.7 days, what is the effective data rate in the unit of Mbps?

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What is the speed of light in an optical fiber?

$2 \times 10^8 m/s$ 2 \times 10^8 m/s

$1.5 \times 10^8 m/s$ 1.5 \times 10^8 m/s

$2.5 \times 10^8 m/s$ 2.5 \times 10^8 m/s

$3 \times 10^8 m/s$ 3 \times 10^8 m/s

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Which organizations define the standard for Ethernet cable (UTP category 5e)?

IEEE

IEC

IETF

TIA

100%

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Which organizations define the standard for Ethernet cable (UTP category 6)?

IEEE

IEC

IETF

TIA

100%

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What is the speed of EM wave in an Ethernet Cable?

$2 \times 10^8 m/s$ 2 \times 10^8 m/s

100%

$1.5 \times 10^8 m/s$ 1.5 \times 10^8 m/s

$2.5 \times 10^8 m/s$ 2.5 \times 10^8 m/s

$3 \times 10^8 m/s$ 3 \times 10^8 m/s

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Suppose you carry 11 DVD disks (each disk stores $4 \times 10^9$ 4 \times 10^9 bytes) from your home to the university, and assume your travel time is 4 hours, what is the effective data rate in the unit of Mbps?

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For a noisy channel, when the bandwidth is H, what is the theorem to estimate the channel capacity?

Shannon's capacity theorem

100%

Nyquist's capacity theorem

Shannon's sampling theorem

Nyquist's sampling theorem

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Consider a noiseless channel, suppose the bandwidth is 68395 Hz and a signal has 12 discrete level, what is the capacity of the channel (in the unit of bits per second)?

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For a noiseless channel, when the bandwidth is H, what is the theorem to estimate the channel capacity?

Shannon's capacity theorem

Nyquist's capacity theorem

100%

Shannon's sampling theorem

Nyquist's sampling theorem

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Consider a noisy channel, suppose the bandwidth is 18292 Hz and the signal to notice ratio is 10 dB, what is the capacity of the channel (in the unit of bits per second)?

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