Hey Marcus - I don't want to sound like Mr. Sour Grapes, but I used to be all gung ho about certifications, and I went through a stint a few years back where I was going crazy getting every single cert that I could get my hands on. I got my ccna, mcse, rhce, Citrix, VMWare, etc. Did I learn a lot studying for them? Yep - TONS. But then one day, I was updating my 2003 MCSE to Win 2008, and my employer paid for me to go to a bootcamp. The class was about $4500, and I literally spent a week in front of a computer studying "sample questions" that when I wound up taking the test, I found out were the EXACT same questions on the actual test. And I mean EXACT. The multiple choice answers were even in the same order.
So now that I'm on the other side of the fence, and I get to hire IT guys as part of my job, I'll be honest when I say that I don't place too much emphasis on certs, because I know that anyone can plop down 5 grand and get one regardless of what they really know. And it's pretty easy to tell during an interview if someone has any hand's-on experience, or if they just paid their way through a bootcamp, or downloaded braindumps.
My advice? If you really want to get started learning networking - go on ebay, buy a CCNA POD (which was "way back in my days"
2 3600 series routers and 2 2900 series switches), connect them, configure them, break them, etc. Spend time learning how to write configs, back them up, set up a tftp server, make your own cables, learn ISDN, learn frame relay, know OSI like the back of your hand, and when you have your confidence levels up, then go take the test. If you pass, great. If not, at least you'll have learned some pretty decent hands on networking lessons that no one can ever take away from you. And who knows, maybe you'll feel more confident on an interview than you would if you only had a cert and no hand's on experience.
Just my 2 cents.
Bobby