Peter, a malicious hacker, wants to perform an attack. He first compromises computers distributed across the internet and then installs specialized software on these computers. He then instructs the…

Peter, a malicious hacker, wants to perform an attack. He first compromises computers distributed across the internet and then installs specialized software on these computers. He then instructs the compromised hosts to execute the attack. Every host can then be used to launch its own attack on the target computers. Which of the following attacks is Peter performing?