Chuck Black is co-founder and principal software architect at Tallac Networks. He has more than 30 years of experience in the field of computer networking, working in research and development labs at Hewlett-Packard for most of that time before becoming co-founder of Tallac. Most recently he is the creator of multiple networking products for HP in the area of network access control and security. Prior to this work, he developed products in the field of network management for HP's Software organization. In the early days of LANs, he was author of some of the first network topology discovery applications in the industry.