توضیحات:

With "Subnet skills" you can improve your skills with multiple choice questions on subnetting. It provides students and teachers with several tests about subnetting. Endless series of exercises to practice with. Hone your skills if you study for both CCENT, MCSE, RHCE or CCNA exam and for school activities.
Furthermore, "Subnet skill" could be merged with "CIDR Calc" and "Subnet Calc" apps, by the same author.