The internet has made massive progress since the 1990s. The amount of traffic that crosses the Internet now is 22 million times more than what was generated in 1992. Although the fiber optic cables replaced the century-old copper cables to transmit trillions of bits per second, the end user at a local area is still hungry for more bandwidth to run new emerging applications. This put both ISPs and the mobile network operators under challenges: Are they ready for the Mammoth Internet? Will ISPs be able to offer the capacity to meet the growing demand? Is their infrastructure capable of serving the future disruptive services such as 4K/8K technology, VR/AR, autonomous vehicles, etc? The literature lacks a comprehensive study of bandwidth requirements for the end user in both fixed-access and mobile Internet. In this research, we bridge the gap that is missing in the current literature. We provide an insightful study regarding bandwidth consumption in both fixed-access and mobile networks. We investigate bandwidth drivers in both fixed access and mobile networks and forecast the future behaviors and consumption of the end user. Our models include all possible types of end users and their bandwidth consumption behaviors. Our results show that video entertainment with 4K technology along with VR/AR will be the top drivers of future bandwidth, while IoT will be of least impact among them. Furthermore, our model can be employed in socio-economic models to predict the economic benefits and potential revenues.