RPSC Programmer Exam Date 2024 | Network | Error Detection and correction By Dr. Anil Kumar

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RPSC Programmer Network | Error Detection and Correction

In network communication, error detection and correction are crucial processes to ensure the integrity and reliability of transmitted data. Various techniques and protocols are employed to detect and correct errors that may occur during data transmission over a network. Let's explore some of the key concepts and methods used in error detection and correction:

Checksum: Checksum is a simple error detection method where a unique value is calculated based on the data being transmitted. This value, known as the checksum, is appended to the data. At the receiving end, the checksum is recalculated, and if it doesn't match the transmitted checksum, an error is detected.

Cyclic Redundancy Check (CRC): CRC is a more robust error detection technique widely used in network protocols like Ethernet. It involves generating a CRC code based on the data being transmitted using polynomial division. The receiver also computes the CRC code and compares it with the received CRC code to detect errors.

Parity Checking: Parity checking is a simple method used to detect errors in binary data. In even parity checking, an extra bit (parity bit) is added to the data such that the total number of 1s in the data, including the parity bit, is even. In odd parity checking, the parity bit is added such that the total number of 1s is odd. At the receiver's end, the parity of the received data is checked, and if it doesn't match the expected parity, an error is detected.

Forward Error Correction (FEC): FEC is a technique used to both detect and correct errors in transmitted data without the need for retransmission. It involves adding redundant information (error-correcting codes) to the data before transmission. The receiver can use this redundant information to detect and correct errors in the received data.

Automatic Repeat reQuest (ARQ): ARQ is a protocol used in network communication to detect and correct errors through retransmission of corrupted or lost packets. When the receiver detects an error or missing packet, it sends a request to the sender to retransmit the data.

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Error Detection
Error Correction
Parity Check
Checksum
Cyclic Redundancy Check (CRC)
Hamming Code
Forward Error Correction (FEC)
Repetition Codes
Error Control
Bit Error Rate (BER)
Error Detection Techniques
Error Correction Techniques
Redundancy Bits
Syndrome Decoding
Burst Error Correction
Convolutional Codes
Error Correction Models
Error Detection Algorithms
Error Correcting Codes
Automatic Repeat reQuest (ARQ)

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