| Describe what parity bits are | The parity bit ensures that the total number of 1-bits in the string is even or odd |
| Explain how checksums are used | Data from the initial block is summed, using character encoding, to create the checksum
The data is sent with the checksum
If the sum of the received data = checksum
The sum of both is the same and its deemed correct |
| Describe what majority voting is | Error checking method of assuming the majority to be correct |
| Describe what checksums are | A mathematical algorithm applied to a block of data |
| Describe what check digits are | A form of redundancy check used for error detection on identification numbers which are used in an application where there will be at least some manual input |
| Why was Unicode introduced | Unicode was designed to support characters from all languages around the world, becasue ASCII could only do english |
| Describe ASCII | It is a code for representing 128 English characters as numbers, with each letter assigned a number from 0 to 127 |
| Describe unicode | Universal character encoding standard for characters from all languages around the world |
| State what character encoding is | assign a number to every character that can be used |
| Explain how parity bits are used | Depending on wether the parity bit is even or odd, the parity bit will make the total number of 1s in the binary string be even or odd
If it is supposed to be even and it is then the number is deemed correct |
| Explain how majority voting error checking works | Each bit is sent numerous times
If there is a variation in the bits then the most frequent one is assumed to be correct |
