5 Questions
What is the purpose of the parity bit in the even parity scheme?
In the even parity scheme, the purpose of the parity bit is to make the total number of 1's in the data, including the parity bit, even. For example, if the total number of 1's is odd, the parity bit is set to 1 to make it even.
Explain the Parity Check method and how it is used in data communication?
The Parity Check method is a simple error detection method used in data communication. The transmitter adds a 'parity bit' at the end of the data before transmission, with the value of the parity bit depending on whether the transmitter uses an even or odd parity scheme. It is able to detect a single error during communication.
What is the value of the even parity bit for the data 1001100?
The value of the even parity bit for the data 1001100 is 1, as the total number of 1's in the data is 3, making it odd. Adding a parity bit of 1 makes the total number of 1's even.
Explain the purpose of the parity bit in the odd parity scheme?
In the odd parity scheme, the parity bit is used to keep the total number of 1's in the data, including the parity bit, odd. For example, if the total number of 1's is even, the parity bit is set to 1 to make it odd.
What is Cyclic Redundancy Code (CRC) and how does it function?
Cyclic Redundancy Code (CRC) is a method used for error detection in data communication. It involves generating a fixed-length check value based on the data to be transmitted. This check value is appended to the data and is used at the receiver to detect any changes to the data during transmission.
Study Notes
Parity Check Method
- The Parity Check method is a simple error detection technique used in data communication.
- It involves adding an extra bit, called the parity bit, to the end of the data before transmission.
- The parity bit's value depends on whether the transmitter uses an even parity or an odd parity scheme.
Even Parity Method
- In even parity, the number of 1's in the data, including the parity bit, is made even.
- Example: Data = 1000101, total number of 1's is 3, so the parity bit is 1 to make the total number of 1's even (4).
- Data after adding parity bit = 10001011.
- For data 1001100, the value of the even parity bit is 0, to keep the total number of 1's even (4).
Odd Parity Method
- In odd parity, the number of 1's in the data, including the parity bit, is made odd.
- Example: Data = 1110111, total number of 1's is 6, so the parity bit is 0 to keep the total number of 1's odd (6).
- Data after adding parity bit = 11101110.
Cyclic Redundancy Code (CRC)
- CRC is a type of error-detection method used in data communication.
Test your knowledge of data communication with this quiz on the Parity Check method. Learn about how the parity bit is used for error detection and whether the scheme uses even or odd parity. See if you can identify how many errors can be detected using this method.
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