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Why is loop polling more efficient than roll-call polling? Relate the IEEE 802 LAN standards to the seven-layer OSI model. Describe the sublayering involved ? What is a SAP, and what is its function? ? LLC derives from what familiar link-layer protocol? Describe the three basic communication services offered by the LLC. In the description show similarities and differences among the three.
First you must give all different possible connection types for them and then, for each case, you should develop some tests that can define the connection type and calculate the current passing through the capacitors.
We have a continuous time-domain sinewave signal x(t) = sin(500xt +π / 5). We sample the time-domain signal with sampling period T = 0.2ms and we get the sequence 4n] . If we start sampling at time t = 0 , we will obtain samples at
A dc-to-dc converter has an input voltage of 5 V and an output voltage of 12 V. If the input current is 1 A and the output current is 0.25 A, what is the efficiency of the dc-to-dc converter?
Carlos runs with velocity v=(5.0 m/s, 25 degrees north of east) for 10 min. How far north of his starting position does Carlos finish
The department of energy projects that between the years 1995 and 2010, the united states will need to build new power plants to generate an additional 150,000MW of electricity to meet the increasing demand for electric power.
Reflect upon the strengths, weaknesses, opportunities and threats associated with a business that you are familiar with (one you work at, one you completed your assignments on, or one you have just acquired knowledge about).
A balanced star load of 8+j6 O per phase is connected to three-phase, 230 V supply. Find the line current, power factor, power, reactive VA and total VA.
A cylinder contains a mixture of helium and argon gas in equilibrium at a temperature of 152°C. (a) What is the average kinetic energy of each type of molecule. J/molecule (b) What is the rms speed of each type of molecule.
digital radio link has a bandwidth of 8 kHz and support a transmission of 87 kbps. According to Nyquist how many bits per symbol are required to modulate the signal Remember to use an integer number of bits.
The ATSC broadcast television system used in the US transmits video signals at an average rate of 18.34 Mbps and employs 8-VSB modulation.
An analog system has a bandwidth of 10 MHz, a photodetector of = 0.5 A/W and ID = 1 nA, and a signal to noise ratio (SNR) of 30 dB. The receiver's temperature is 270 C and the load resistance is 50 .
A parallel plate capacitor of capacitance C0 has plates of area ( A ) with a separation ( d ) between them. When it is connected to a battery of voltage ( V0 ) it has charge of magnitude ( Q0 ) on its plates.
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