CCNA - Cisco Certified Network Associate, is a certification for people looking to gain a high level of knowledge in networking and Cisco products.
It is also a prerequisite for other high level Cisco certifications, such as CCNP, CCIE.
There are two ways to train for this exam.
You can either buy a book and learn yourself, (I bought the book below which is very useful, and I read it cover to cover before taking the exam) this method is good, but you will miss out on practical experience unless you have a couple of Cisco routers lying about in your garage. You can buy Cisco simulators which you can practise on, but I didn't like these too much.
The other way is to check out your local colleges for evening classes or boot camps, which will aid your learning providing you with exposure to Cisco equipment and teachers knowledge.
The CCNA 640-607 is a 75 minute exam with a varying number of questions. This exam is fairly difficult and you need to know your stuff inside out!
Last minute CCNA study tips
Cisco CCNA Networking Academy
The Cisco Networking Academy is an online learning resource which will guide you through the CCNA pathway, providing online assessment, training and hands-on labs.
Cisco Networking Academy
Cisco CCNA Threaded Case Study
Below is the Cisco Threaded Case Study (TCS) that I was involved with while studying for my CCNA.
A similar case study will need to be undertaken by you if you choose to study the Cisco Networking Academy.
Threaded Case Study