Your question is Segment a Network with VLANs. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are responsible for a small lab network that needs to separate management traffic, user devices, and test equipment on the same switching infrastructure. The current setup places everything on one flat Layer 2 network, and you have started seeing broadcast noise and accidental cross-device reachability during testing. You need to propose a cleaner network layout using VLANs and assign subnets from a provided IPv4 range.
What is a VLAN, and how would you use it to segment this network? Then, given an IP range, explain how you would derive the required subnets and validate that hosts in each VLAN can communicate only as intended.