Generally speaking your resume is split into several sections
- Introduction (typically a one or two sentence goal for your resume AKA what do YOU want)
- Relevant Education
- Relevant Job Experience
- Relevant Skills and Expertise
- Relevant Awards / Recognition
Many resumes will have more sections than this such as security clearance, public involvement, volunteer work, ect depending on what's relevant to the potential employer.
Generally speaking I've found putting your certs toward the end of your Skills / Expertise the best, Awards as an acceptable second though. Basically in your skills section you'll list off all the things you're able to do, as an IT pro it's good to list various OSs you're experienced with, server architectures, etc. Then follow up with your certs that basically tells me. "Here's the things I know, and here's the papers to back up that claim"
Sure Certs aren't the free ride they used to be. (Used to be if you had your CCNA you could practically take a job from someone who didn't), but they still have value. That said it's still a net gain to mention them.
If you have control of formatting
Often when you put your resume over to a recruiter, or on linkedin, or carreer builder you have little control over formatting, in those cases just slap the certs into the skill section unless they have a dedicated place for them.
In the event you're applying directly or you DO have control over formatting (IE you're sending them your resume directly) Take advantage of formatting the layout. As someone who hires I see the same tired default Word resume format day in day out, people who take the time to make something a little nicer are far more likely to catch my attention.
Personally my resume I've split my expertise section off into a small column on the right (15-20% the page width) that just lists my skills, expertise, and certs. I find this works MUCH better as most resumes your skill section is an almost unreadable wall of text. (I've seen some people format it decently inline, but most of the time it's pretty terrible) The column on the other hand makes it easy to spot individual items, list more skills without looking cluttered, and you can organize them in sections like Languages, Operating Systems, etc to make it REALLY easy for the person hiring to see if you have what they are looking for.
I personally have my certs at the very end of my list off skills in that column. Again, they aren't terribly valuable, but at least it helps say. "I'm not dropping buzz words, I actually know the stuff I just listed"