Philip Knoll

Philip Knoll is CEO of Graw-Hill, the publishing company that published several IT books. He worked at Interoute, Europe's largest voice and data network provider. Before Interoute, he was working as a senior network engineer for the Global Internet, a significant Internet and Telephony Services Provider to the market. He has been working with Linux for more than 10 years putting a strong accent on security for protecting vital data from hackers and ensuring good quality services for internet customers. Moving to VoIP services he had to focus even more on security as sensitive billing data is most often stored on servers with public IP addresses. He has been studying QoS implementations on Linux to build different types of services for IP customers and also to deliver good quality for them and for VoIP over the public Internet. Philip has also been programming educational software’s with Perl, PHP, and Smarty for over 7 years mostly developing in-house management interfaces for IP and VoIP services.