The byte (B) is the standard unit of digital storage consisting of 8 bits, enough to represent a single character like a letter or number. File sizes, memory capacity, and storage devices are all measured in bytes or their multiples, making it the most commonly referenced unit in computing. One byte equals exactly 8 bits and can represent 256 distinct values.

The megabit (Mbit) equals 1,000 kilobits or one million bits, most commonly seen in internet speed ratings where ISPs advertise plans in megabits per second (Mbps). It is important to distinguish megabits from megabytes, since a 100 Mbps connection delivers roughly 12.5 megabytes per second of actual download speed. This unit is essential for comparing and understanding network performance.