I have the opportunity to do CCNA 1-4 plus maybe either the first security course or the first VoIP course for free
Are they worth the time? Somebody of you have them?
Worth it if you work in an IT position where you touch networks.
How much it helps you will be dependent on
1. if you want to learn routers/switches, firewalls or whatever
2. HR for the jobs you want believes its important
is right, it is "only" a certificate, but it is not necessarily recognized worldwide.
Thing is, I can do this at uni and it is not my main subject but I'm interested in these things and I think that networks and the knowledge to harden them (possibly) could be a nice side ability for jobs