For Windows Server environment look into something like the MCITP. This exam series is going to expire in about a year I believe because it is based on Server 2008/2008 R2 and Server 2012 is going to be coming out which will replace it with a new exam series.
I don't think that Microsoft will retire MCITP exam series anytime soon.
The exam(s) contents will be updated to reflect the evolution of their platforms and the current industry needs (regarding the skills to master).
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If as stated your target is Networking & Hardware building/maintenance, you will need to know in which context you will be exercising all what you have learned and get certified for.
Its a crucial point, it comes before you even look for a suitable learning path.
Are you planning to work for a company, setup a computer shop/service, work part time as a consultant for other companies while still have your own business...
Based on the answer from the above question, you will then focus on some particular courses : A+, CCNA, MCTS...
For the requirements to achieve your goal could scale from "soft" to "heavy load" depending on your answer to the very first question.
Next, chose the learning path. Self study, attend a school. A Bootcamp training will be a waste of money in your case, as its rather something for the seasoned IT specialist.
For the other 2 scenarios, you will need to devote time and be passionate about what you will be doing; otherwise you will drop out before the finish line; specially if working for an Enterprise is what your aiming at.
Why am i saying this ?
The stuff to learn will be plenty and the time "compressed".
Unless you are living off of a capital, you will feel the urge to quickly put into practice your new skills and get some financial rewards in return.
And as you are a profession switcher and not a "fresh student", there won't be an internship period where you could inadvertently wreak havoc at your work without penalty.
The catch here is learn fast and learn good.
Aside the theory, you will need machines to practice. So prepare to invest or fetch some of your oldies from the attic.
Even if you have some machines in your classroom (in case you go that way), you will still need to work some more at home; at least 2 more Hours a day.
IT industry, as someone already pointed out, is very large.
So when choosing a particular course, you will realize that you will also need to touch some side-by fields in other to carry out your main task.
For instance, if you are a Desktop Administrator or into Virtualization, you will need to know things about Networking without necessarily being a Network Admin.
As long as there will be some machines to look after, there will be work for those who know how to carry out the task.
Virtualization is Hot nowadays and probably for many years ahead.
So despite the gloomy economical stand/projection, i encourage you to continue with your initial plan for a career in IT. Forecast have it that in 15 years, 75% of any type of job will require a minimum knowledge in the usage of a computer.
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