Learn about the OSI in a detail, in an easy fun way, and with examples to really help you understand the foundations.
SAMPLE Mastering the OSI Model COURSE VIDEOS
I just wanted to say "Thank you!" for writing such wonderful materials to help in studying. You have a special way of writing that really makes it easy to understand and learn. I use your books in conjunction with other Cisco materials and I have to say there's just something different about your writing style that I can't find anywhere else. So thank you very much, and I hope you keep writing for other certification exams as well!— Phil Adkins
I took Todd’s FirePower class and it delivered on every front. Todd was able to clearly explain how to configure the product, show his lessons learned on his many projects, and also took the time to answer my many questions – even after the class was over. As a Cisco employee, I have access to many internal trainings, but this one was much better than anything I have found internally to Cisco. I highly recommend this class to anyone interested in learning FirePower.— Marc Roberts
Cisco Advanced Services
The 5 days FirePower / FTD class I attended lead by Todd Lammle, and supplemented by his great support staff was one of the best training experiences I have had in my 20 years in IT. The training consisted of lots of relevant, practical, real world hand on labs and lectures, and as a bonus we even had the opportunity to go through live troubleshooting the tuning of a production environment.— Joel Nelson, CISSP
Sr. Network Security Engineer, Grady Health System