The text discusses a 65Gbps DDoS attack experienced by CloudFlare on September 17, 2012. It explains that such an attack is considered large and requires significant resources to execute. The attacker likely used a botnet of compromised computers to generate the traffic. Additionally, the attack utilized a technique called DNS reflection, which amplifies the size of the attack by exploiting misconfigured DNS resolvers. CloudFlare mitigates such attacks through its network architecture and filtering mechanisms.