21. If only one parity bit indicates an error, the parity bit itself is in error. 22. In retrospect a solution could have been to add a parity bit to each number as written. 23. If a parity bit is used, it would be placed after all of the data bits. 24. Thus, two redundant but different sub-blocks of parity bits are sent with the payload. 25. This tests the link, and assures that the parity bits are sent quickly to finish messages. 26. Memory was in the form of 13-bit syllables, each with a 14th parity bit . 27. This triple repetition code is a Hamming code with since there are two parity bits , and data bit. 28. For secure transmission and to indicate the end of data transmission CRC bits or parity bits can be added. 29. It had a words of 45 bits each ( plus one parity bit ), using mercury delay line memory. 30. Each half word ( 24 bits ) had a parity bit , for a total storage size of 50 bits.
