I Am In The Process Of Taking 640-553 ExamI am working since July on CCNA security 640-553 exam. I have practiced a lot in troubleshooting and configuring of all types of firewalls especially zone-based. Also, worked on VPN using SDM as it was a must topic to cover. I have purchased CCNA security Official exam guide and for questions and answers I got them with from certkiller I am a very satisfied customer and I always use their products whenever I am preparing for any certification. For labs I have CBT nuggets and all them made a perfect combination of labbing, reading and practicing. I could not schedule me 640-553 exam yet but very soon will go for it probably the next week.
Alan

I Have Done 60% Of My Reading With CertkillerI want to do CISSP later and pursue my career as system security professional for this I needed to pass 640-553 exam. I have attended a webinar on network security this boosted me more. So I have decided to go for it. Luckily my friend lend me CISCO press book for CCNA security and certkiller questions and answers. I used GNS3 and I installed SDM on a virtual router - it took me a while to find one that had IPS and ZBF enabled but once I get through it I configured that. Certkiller updated my 640-553 knowledge with its updated questions. I take the 640-553 exam and passed.
Hudsom Bill

Just Passed The CCNA Extension 640-553I have just gone through the CCNA extension security voice and wireless. And working as a network administrator security was my preference. While studying for CCNA I have used Todd Lemmle guide and certkiller questions and answers along with Packet tracer. And for CCNA 640-553 extension the top priority was TODD’s book but he did not write any book on that so I have purchased exam cram. But they end I felt that was just money wastages as the questions on IPS were too few so I jumped back to certkiller and studied all its questions and answers they were not only update but are sufficient in quantity. Yesterday I took the exam and passed.
Humberto

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