Jarek Rek is a networking professional with over 12 years of experience. He worked for Cisco Partner Companies providing their customers with networking solutions, technical support and training. Currently, he has been working as Cisco Trainer in the areas of routing and switching, service provider and security. He has also achieved the Cisco Sirius Award – Top Quality Trainer for constant high achievement in Cisco delivery in 2012. In his spare time he maintains routing blog at http://hackingcisco.blogspot.com designed to help beginners, intermediate, and advanced students hone their technical skills.