<ul data-eligibleForWebStory="true">Cloudflare reported a massive DDoS attack hitting 7.3 terabits per second, the largest ever.The attack sent 37.4 terabytes of data within 45 seconds, equivalent to over 9,300 HD movies.Attackers targeted a Cloudflare customer by 'carpet bombing' 22,000 destination ports on a single IP.UDP flood attacks overwhelmed the target's resources with high packet volumes.Reflection attacks accounted for a small portion of the DDoS, redirecting traffic through third-party intermediaries.Reflection attacks make it harder to defend against DDoS attacks and increase attack firepower.The DDoS used various reflection or amplification vectors like the Network Time Protocol and Quote of the Day Protocol.The attack was facilitated by one or more Mirai-based botnets, compromising home IoT devices.DDoS attack sizes have been steadily increasing, with recent attacks peaking at 6.5Tbps and 6.3Tbps.Large-scale attacks aim to overwhelm Internet services by sending excessive traffic, causing denial of service.