Data Error Detection and Correction

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Questions and Answers

What is the central concept in detecting or correcting errors in data transmission?

Data encryption

Redundancy (correct)

Signal amplification

Noise reduction

At which layer is error detection performed in data transmission?

Application layer

Data link layer (correct)

Transport layer

Network layer

What happens to the redundant bits added by the sender during data transmission?

They are removed by the receiver (correct)

They are returned to the sender

They are kept by the receiver

They are discarded in the transmission

What is inserted into a frame of data at the data link layer for error detection?

Error detection code Signup and view all the answers

What can cause errors during data transmission?

Either a simple blip or a massive outage Signup and view all the answers

What is the purpose of adding parity bits to each character in Parity Check?

To produce an even or odd number of binary 1s Signup and view all the answers

What does the Two-Dimensional Parity method do to increase the likelihood of detecting burst errors?

Organizes blocks of data as a two-dimensional array Signup and view all the answers

What is a checksum in the context of error detection in data transmission?

A sequence of numbers and letters used to check data for errors Signup and view all the answers

How does the Cyclic Redundancy Checksum method work in error detection?

By treating the packet of data as a large polynomial Signup and view all the answers

What is the error-detection capability of the Cyclic Redundancy Checksum method?

Approximately 100 percent Signup and view all the answers

What does the Parity Check method add to each character for error detection?

Redundant bits Signup and view all the answers

Which method treats the packet of data to be transmitted as a large polynomial?

Cyclic Redundancy Checksum Signup and view all the answers

What is the result of adding 0 or 1 to the string in even parity?

Produces an even number of binary 1s Signup and view all the answers

What is organized as a two-dimensional array in the Two-Dimensional Parity method?

Blocks of data Signup and view all the answers

What is added to the end of the message in the Arithmetic Checksum method?

Checksum Signup and view all the answers

Study Notes

Error Detection in Data Transmission

The central concept in detecting or correcting errors in data transmission is to add redundant bits to the data being transmitted.

Error Detection Layer

Error detection is performed at the data link layer in data transmission.

Redundant Bits

The redundant bits added by the sender during data transmission are removed at the receiver's end.

Data Link Layer

A Frame Check Sequence (FCS) or a Cyclic Redundancy Check (CRC) is inserted into a frame of data at the data link layer for error detection.

Causes of Errors

Errors during data transmission can be caused by noise, attenuation, or interference.

Parity Check

The purpose of adding parity bits to each character in Parity Check is to enable the receiver to detect single-bit errors.
In Parity Check, a parity bit is added to each character to make the total number of 1-bits either even (even parity) or odd (odd parity).

Two-Dimensional Parity

The Two-Dimensional Parity method increases the likelihood of detecting burst errors by treating the data as a two-dimensional array.

Checksum

A checksum in the context of error detection in data transmission is a numerical value computed from the data being transmitted.
The recipient can then compute the checksum again and compare it with the transmitted checksum to detect errors.

Cyclic Redundancy Checksum (CRC)

The Cyclic Redundancy Checksum method works by treating the data as a polynomial and dividing it by a generating polynomial to produce a remainder (CRC).
The remainder is appended to the data and transmitted along with the data.

Error-Detection Capability

The Cyclic Redundancy Checksum method is capable of detecting all single-bit errors, all double-bit errors, and most burst errors.

Parity Bit

The Parity Check method adds a parity bit to each character for error detection.

Polynomial Method

The Cyclic Redundancy Checksum method treats the packet of data to be transmitted as a large polynomial.

Even Parity

Adding 0 or 1 to the string in even parity results in an even number of 1-bits.

Two-Dimensional Array

The data is organized as a two-dimensional array in the Two-Dimensional Parity method.

Arithmetic Checksum

In the Arithmetic Checksum method, the sum of the data is computed and added to the end of the message.

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Description

Test your knowledge on data error detection and correction networks with this quiz! Learn about the different types of errors that can occur during data transmission and how redundancy plays a role in minimizing these errors.