Identify at least one DoS$/$DDoS mitigation technique $($e$.$g$.,$ rate limiting$,$ blackholing, or content delivery networks$)$ and explain how it helps in preventing or reducing the impact of these attacks.

Choose a DoS$/$DDoS protection tool $($e$.$g$.,$ Cloudflare, Arbor Networks$)$ and describe how it works to detect and block incoming attacks.