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A special system of multiple parity bits (e.g. Hamming parity) that allows not only error detection but limited error correction.Ordinary single bit parity can detect reliably single bit errors.Hamming parity can correct single bit errors and detect reliably double bit errors.
This question is not specific enough. what is the drawback for a single cell in what way? compared to what else?
The single parity check uses one redundant bit for the whole data unit. In a two dimensional parity check, original data bits are organized in a table of rows and columns. The parity bit is then calculated for each column and each row.
Single point of failure
The receiver won't detect the error, as a parity check bit only detects inversion of an odd number of bits.
Parity
One of the Advantage of synchronous detection is that it causes less distortion when compared to envelope detection. Also synchronous works well with Single sideband signals.
There are no drawbacks, single phase is used every day. It is the most commonly used electrical supply in the world today.
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PARITY
individual practical method with single toposheet
odd parity transmission is based on the transmission of an odd number of one bits for each byte or character or minimum data unit. odd parity transmission is used as a simple form of error detection when transmitting data through a medium such as wire. typically a transmission record or packet may be split into eight bit segments with a ninth bit appended to each segment so that nine bit are transmitted for segment. The ninth bit is set to zero or one so that each segment has an odd number of one bits. At the receiving end, each segment is checked to insure that an odd number of bits are set to one. If not, than a transmission error exists and some measure is taken to have the record or packet resent. Parity checking by itself is not fool proof. It can catch the loss of a single bit of data in a byte but if two bits (or an even number of bits) are wrong, no error will be detected as parity will show to be valid.