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Use this site to learn and practice subnetting. If you are taking CCNA training or studying for the Network+ certification, subnetting practice is an essential requirement. provides a wide range of practice questions in the 'Practice' section and also in our timed subnetting quiz. Don't foul out though, when the clock is running, you better bring your A-Game!

Check out our new CCNA Practice Questions. We promise, they're awesome!


Aug 8, 2014: We are proud to present our brand new CCNA Practice Questions! We've also given our site a minor facelift. The top menu was getting a little crowded, so we've added a footer with quicklinks to everything you need.

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