Hi,
I'm a Network Pro with over 11 years experience of which 4 as a CCNA instructor and tutor for 2 different on-line training organizations.
My certifications include, CCNA, CompTIA Network+, CompTIA Security+, Certified Ethical Hacker, Computer and Hacking Forensics, among others.
In terms of time frame, it depends on what you already know (you want to start from scratch?), the time you are willing to devote to this, the methodology, etc.
To speed-up the process, we will use some lab tools to simulate real networks.
Further details can be shared once you reply to this offer.
Regards,
Grácio Filimão