Does anyone know something similar to
subnettingquestions.com - Free Subnetting Questions and Answers Randomly Generated Online but asks the design questions? for some reason most of the questions on subnettingquestions.com ask mostly to find the host range, broadcast address, valid hosts etc and not questions like "How many subnets and hosts per subnet can you get from the network 172.16.0.0/23?" or "You are designing a subnet mask for the 192.168.210.0 network. You want 13 subnets with up to 11 hosts on each subnet. What subnet mask should you use?"