This course is all about Cisco CCNA R&S and everything you need to master your knowledge to become a decorated network engineer. I have explained all commands in detail so that you can easily get a grab on that feature. If you cannot find a feature or command, this means either it is obsolete and a better feature replaces that or I have forgotten to include it. In the latter case, I will be more than happy if you let me know what you want and I will add it to the curriculum.I have used GNS3 for the simulation. However, you can execute all commands on a real gear without any change.