The Networksims.com package contains an extensive
range of router challenges in the wide range
of certifications, including CCNA, CCSP, CCNP,
CCVP and so on. At present there is over 230
challenges. A few examples include:
New SDM Windows configuration. A pre-release version of the SDM simulator is at [Demo 1] [Demo 2]. This is a unique feature that you will not find in any other simulator!