DNS provider Dyn was knocked offline for much of the day, causing disruption to several well-known SaaS applications and internet sites. The company later that day confirmed that the cause was a large DDoS attack, and that it was an internet of things (IoT) attack using the newly-discovered Mirai botnet. The Imperva Incapsula product team has years of experience dealing with bots and DDoS attacks. The attack is akin to cutting off the telephone network before an invasion to prevent communication.”]
Source: https://informationsecuritybuzz.com/articles/ddos-attack-dyn-recap-imperva/