I read your thorough review of security professional certifications and it seems they would be extremely helpful to someone who already possesses networking experience. I have 14 years of experience in the telecommunications field with knowledge focused mostly on the WAN; however, I do have experience on the periphery with the LAN. I've been doing a great deal of research regarding the increased focus of late on network security and wonder if you have a recommendation on how to prepare for a career in network security with no real previous networking experience. I have no idea where to start and what the path would be to become a network security expert.
If you know your way around TCP/IP pretty well -- and I'm guessing you do, because of your self-described background -- you are probably more knowledgeable and better-prepared than you might think. There's one easy way to find out: Get a good study guide for the CompTIA Networking+ exam, and skim through it. If some or most of it looks familiar, you are further along than you think. If less than half sounds familiar, you can remedy your lack of networking knowledge by studying for and taking this exam. After that you can jump right into the security certifications field without too much worry. I'd recommend starting easy, with the various BrainBench credentials (I think they have one on networking security, another on Internet security) Consider these just a warm-up, they don't have much value in the workplace. After that, tackle one of the three best-known "intro certs": SANS GSEC (www.giac.org); TICSA (www.trusecure.com); or SSCP (www.isc2.org). Next, you'll want to either start climbing the SANS GIAC ladder or go after the CISSP (www.isc2.org).
That should keep you busy for a year or two. Good luck!
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