Parity Checking

Question 1

Define parity checking

Answer 1

• Check if data has been lost or corrupted following transmission from one device to another
• A byte of data is allocated as the parity bit
• Parity bit is added together with the 1s bits
• If different parity after transmission then error detected

Question 2

What is ARQ or ARR

Answer 2

Automatic Repeat Request

Question 3

Define ARQ

Answer 3

• Check if data has been transmitted correctly
• Uses acknowledgments (message sent by receiver indicating it has been received correctly)
• Uses timeouts, if no response within certain time out, data is resent