packet

A group of bitsThe smallest unit of information. It is a shortened form of "binary digit." Since it's binary, it can have only two values -- typically 0 and 1. being sent from one place to another. How big the group is may vary depending on what kind of packet it is. Long messages — like an email — will typically be broken up into many packets, each of which travels independently until it gets to the destination, where they’re reassembled into the email.