You are well informed, I am also studying for these things, probably not for the same reasons you have as I am already employed at an ISP in the rural midwest, I am doing it because I need to know how to use these resources to their best advantage. Good luck, and I hope you get the information you need. Keep reading the posts here, and if you have any questions of a technical/hardware nature feel free to PM me and I will do the best I can to help.