Your question is DDoS And Network Mitigations. 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).
What is a Distributed Denial of Service (DDoS) attack, and how can network layer security controls mitigate it?
Keep your answer focused on attack types, where network-layer controls help, and where they do not. Name the controls you would use, the threat each one reduces, and how you would verify they are working.