You must have a good level of experience with routers and switches if you are serious about passing a CCNA examination. You can gain this and more through Microsoft virtual labs e-trainer courses available online.
You can get more practice with the equipment and use it along with suggested labs that cover the CCNA exam modules etc. Using a CCNA virtual labs e-trainer you can save thousands of dollars that could have been spent on alternative courses or products. In this way you can get all the knowledge to pass the CCNA Exam in the first attempt. Microsoft has a great number of free virtual labs that allow you to have a better understanding of operating systems such as Server 2003, XP and others. You can be allowed to operate the particular operating system in a virtual environment within a specified amount of time after registering yourself. The different labs have corresponding objectives and labs and you can be given step by step instructions on operating the same easily. There are other types of virtual labs where you need not book time and they can be downloaded easily. You can select virtual labs according to the topics online and try some of these which are offered for free.