destination address in addition to the data. [Computer and Information Sciences] 
parity bit 
n., Refers to protocols in which messages are divided into packets before they are sent. Each packet is then transmitted individually and can even follow different routes to its destination. Once all the packets forming a message arrive at the destination, they are recompiled into the original message. [Computer and Information Sciences] 
perfect record 
n.,
 A bit included in a unit of digital data to detect error