Games Subnetting is one of most difficult skills to master. Even after attending classes or studying the subject of subnetting, students often have difficulty working out subnetting problems. We created the Cisco Subnet Game to help you finally master subnetting! Working with networking experts, game developers and instructors, we developed a game which we hope will make subnetting easier for you. This content is only accessible by Registered Users. If you have not yet registered, you will be prompted to Register, before proceeding to access this content.