Christian Zeng, CCIE #19533


Hi, I would like to thank you for the excellent study material that helped me to successfully pass the security lab in Brussels on my first attempt. Nothing that the lab asked for scared me or caught me off guard - in my opinion this is because of excellent preparation with the help of your materials.

- Christian Zeng, CCIE #19533 (CCIE Security, CCIE Routing & Switching)

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