IDG Answers is a community of experts who are passionate about technology. Ask a question or answer one below.
As I noted in your other question about CCNA, Cisco Learning Network is pretty comprehensive. Most of the information, tutorials and practice tests are free, but there is some premium content that they charge for. I don’t see any reason to go to a third party when you can get the information straight from the horse’s mouth, so to speak. Here is a link to the study/learn page at Cisco Learning Network. Good luck with it.