What are the key metrics and indicators used to measure the effectiveness and performance of a DDoS defense system?

Key metrics for measuring DDoS defense effectiveness include: Time to Detect (TTD) an attack, Time to Mitigate (TTM) the attack, the duration of service Downtime experienced during an attack, the Number of Blocked Attacks, the False Positive Rate (how often legitimate traffic is incorrectly blocked), the Resource Utilization of the defense system during an attack, and the overall Cost Efficiency per attack mitigated. These metrics help evaluate the system's speed, accuracy, and operational cost.