A Zettabit (Zb or Zbit) is a unit of measurement for digital information transfer rate. It is equal to 1,000,000,000,000,000,000,000 (one sextillion) bits. It is used to measure the speed of extremely high-speed data transfer over communication networks, such as high-speed internet backbones and advanced computer networks. The zettabit is part of the International System of Units (SI) and is a multiple of th