Greg Tomsho is director of the computer networking/cybersecurity department and Cisco Academy at Yavapai College in Prescott, Arizona. He has earned the CCNA, MCTS, MCSA, A+, Network+, Security+, Server+ and Linux+ certifications. A former software engineer, technical support manager and IT director, he has more than 30 years of computer and networking experience. He is the author of numerous other leading books, including GUIDE TO NETWORKING ESSENTIALS; MCSA GUIDE TO INSTALLATION, STORAGE, AND COMPUTE WITH WINDOWS SERVER 2016; MCSA GUIDE TO NETWORKING WITH WINDOWS SERVER 2016; MCSA GUIDE TO IDENTITY WITH WINDOWS SERVER 2016; MCSA GUIDE TO INSTALLING AND CONFIGURING MICROSOFT WINDOWS SERVER 2012/R2; MCSA GUIDE TO ADMINISTERING MICROSOFT WINDOWS SERVER 2012/R2; MCSA GUIDE TO CONFIGURING ADVANCED MICROSOFT WINDOWS SERVER 2012/R2 SERVICES; MCTS GUIDE TO WINDOWS SERVER 2008 ACTIVE DIRECTORY CONFIGURATION; MCTS GUIDE TO MICROSOFT WINDOWS SERVER 2008 APPLICATIONS INFRASTRUCTURE CONFIGURATION; GUIDE TO NETWORK SUPPORT AND TROUBLESHOOTING; and A+ COURSEPREP EXAMGUIDE.