Data error checking
When we send data from one place to another, we want to make sure that the data is correct when it arrives. We don’t want to send a message, and have it arrive with some of the letters changed, or some of the numbers changed, because that could cause all sorts of problems!
We can verify that the data is correct when it arrives by using error checking - there are loads of different ways to do this.
Common error checking methods
flashcards
| Question | Answer |
|---|---|
| What are error checking methods used for? | They are used to verify that data is correct when it arrives at its destination. |
| What are three common error checking methods? | Parity bits, Majority voting, and Checksums. |
| What is a parity bit used for? | It is an error checking method used to verify that data has not changed during transmission. |
| What is majority voting used for? | It is a method of error checking where the data is sent multiple times and the value seen most often is accepted. |
| What is a checksum used for? | It is an error checking method where a small mathematical value (checksum) is sent with the data to verify integrity. |