Today I started the second part of the road to CCNA certification: Interconnecting Cisco Networking Devices. To be honest, this course is already a lot more interesting than the INTRO one.. but I'm glad I took INTRO anyway. The teacher started the day by using a permanent marker on a whiteboard... NOT GOOD. We had the usual problems setting up the lab but everything turned out OK. Todays Topic: Spanning Tree Protocol, Switch Security and MAC address management in IOS.