David Coleman is a wireless mobility consultant and trainer. For the last seventeen years, David has instructed IT professionals from around the globe in enterprise WLAN design, WLAN security, WLAN administration and WLAN troubleshooting. In his spare time, David writes white papers, blogs and books about enterprise Wi-Fi networking. David is the co-author of Sybex Publishing’s CWNA Study Guide, CWSP Study Guide and CWAP Study Guide. David is the Senior Mobility Leader for Aerohive Networks and is CWNE #4.