**2.3 Treating big data**

The most important challenge of using the Internet of Things is the tremendous growth of the data transmitted between the connected devices. As seen in **Figure 2**, The basic three sources of data are (1) the database used in the business process; (2) the human daily activities such as email, Facebook, and weblogs; and (3) the connection of physical devices such as cameras and microphones. It is worth mentioning that a full 90% of all the data in the world has been generated over the last 2 years. This makes it more challenging for the Internet of Things infrastructure designers to deal with such growth of the generated data.
