This document provides an overview of WiMAX technology. It describes WiMAX as a wireless technology that uses radio spectrum between 2-66 GHz to provide internet connectivity over long ranges of up to 50km at speeds of up to 70 Mbps. It discusses the key components of a WiMAX system including WiMAX towers and receivers. It also covers the technical aspects of how WiMAX works including modulation methods, transmission duplexing, and the use of OFDM. The document outlines the modes of WiMAX operation and benefits. It then discusses security threats to WiMAX like eavesdropping, masquerading, message modification and DoS attacks. Finally, it mentions authentication, key exchange and encryption as security techniques for WiMAX.