In light of the rise of “DDoS hacktivism” and the recent DDoS attacks aimed at disrupting French and Alabama government websites, the Cybersecurity and Infrastructure Security Agency (CISA) has updated its guidance of how governmental entities (but also other organizations) should respond to this type of attacks. DDoS attacks explained First and foremost, the document explains the main difference between a DoS attack (from a single source) and a DDoS attack (from multiple sources).

Source: Help Net Security