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In a single-bit error correction, a code of three bits can be in one of four states: no error, first bit in error, second bit in error and third bit in error. How many of such bits must be redundant
A receiver receives the code 11001100111. When it employs the hamming encoding algorithm, the outcome is 0101. Which bit is in error? What is the right code?
What is the formula to compute the number of redundancy bits needed to correct a bit error in a given number of data bits?
What are the conditions for the polynomial employed by CRC generator?
What is the fundamental difference between even parity and odd parity?
Describe the difference between slow FHSS and fast FHSS.
What is the basic difference between circuit switching and the packet switching?
The figure below shows a statistical TDM multiplexer. How much is the data rate of each line is reduced if all 10 lines are sending the data? How many stations can send data at similar time with ful
Five signal sources are multiplexed by using synchronous TDM. Each source generates 100 characters per second.
What is the basic difference between an analog switched service and an analog leased service?
What are the main multiplexing methods?
What does the mechanical specifications, electrical specifications and the functional specifications of EIA-232 explain?
What does the word modem stands for? What is the function of a demodulator and determine the function of modulator?
What standard organizations are included in DTE-DCE interface standards? Name some popular DTE-DCE standards.
What would be the data stream if the above stream was NRZ-I encoded?
Describe the difference between Manchester and differential Manchester encoding with an illustration?
Make a distinction between baseband and bandpass signals. How does bipolar signaling diverge from unipolar signaling? Why is Manchester encoding more popular than either?
What is the main drawback in using NRZ encoding? How do RZ encoding and biphase encoding attempt to resolve the problem?
What do you mean by digital-to-analog and analog-to-digital conversion?
A line consists of a signal-to-noise ratio of 1000 and a bandwidth of 4000 kHz. Determine the maximum data rate supported by this line?
Draw a well labeled diagram of a fiber optic cable and explain its working principle. Give its benefits and drawbacks.
What is the main benefit of shielded twisted pair over the unshielded twisted pair?
What are the fundamental differences between the analog transmission and digital transmission?
Illustrate what does the amplitude, frequency and the phase of a signal measure?
Explain the principles of operation of the given sequential logic devices: