Toyos Yooyen, CCIE #21723
I passed CCIE R&S on 4th attempt at Tokyo. Internetwork Expert was Excellent resource to help to become CCIE. 2 months of full time preparing, I solved Internetwork Expert Workbook three time. I got a lot of technical ,pitfall and known all method for solve the question. I think Internetwork Expert Workbook help me to succeed. I give my special thank to Brian Dennis, Brian McGahan, Petr Lapukhov, everyone in Internetwork Expert forum.