I'm going to add something from the perspective of someone who started as a cable puller and worked through every position in IT to end up managing it. Not to sound impressive, but just to let you know that I have at least some knowledge of various positions in IT, because I've held them. I also hold CNE, MCSE, CCNP which don't mean jack #$%^ if I can't back them up on the job
This is only my personal opinion, so take it anyway you wish...
First, I realize that nobody is an expert. I don't care what they say, they don't know everything. Now, with that understood...what's important is not necessarily knowing the answer to a network problem, but know where to "find" the answer.
No matter how you get your cert..remember this. Don't worry about knowing everything. Just worry about knowing how to find the answers you need to do your job. The cert is your foundation to build upon. It shows that you at least understand a somewhat standardize basic knowledge of your field.
When I interview people, I naturally notice the certs on resumes. I respect them. But, then I look at the person. I don't expect the person to know everything, but I expect the person to acknowledge that he/she doesn't know everything...but can find the answer. If I have someone who claims to be a CCNP or MCSE and is constant running to me for help...I've got the wrong person. On the other hand...if that person has exhausted the knowledge base of MS or Cisco and then comes to me. I will gladly assist and not think poorly of that person. Mind you, if it's something critical, then the faster it's fixed the better.
I guess what I'm saying is...get your cert in whatever method fits your budget and desires. But remember that if your resume claims that you know EIGRP, multicasting, MLS, STP, etc. you will be expected to back it up. You may not be expected to know it off the top of your head, but at least know the basics and be able to go find the answers to the rest. I've tested on many things that I don't remember, since I don't use them. But I can do a memory refresh real quick with my resources. But, by saying you are certified, you are saying that you at least know this...this...and this. I would expect a candidate to at least know the basics of this...this...and this.
A piece of paper can open doors that would normally be locked shut for you. After you walk through that door...it's all up to you. Just keep the right mindset during your studies, and you'll do fine.
Sorry to babble, but I've had too many people come through our department that relied on their certs more than their abilities. The cert is a baseline. Your abilities build upon them.
One more thing. Learn as much as you can while getting your cert. Your cert may help you get the job, but I can guarantee your knowledge and experience will get you a better paycheck to go with it.
Good luck, and I hope you do very well in your studies. Never stop learning.