Which of the following are ways to help defend against distributed denial-of-service attacks? (Select the three best answers)

A. Update firewalls.
B. Carefully select applications.
C. Use intrusion prevention systems.
D. Use a "clean pipe."

A, B, and D. Ways to help defend against distributed denial-of-service attacks include updating firewalls, using intrusion prevention systems, and using a clean pipe from your Internet service provider. You should always be careful when selecting applications; however, DDoS attacks will usually be perpetuated on specific servers that run specific applications that need to be functional. It is not the best answer, but you should always watch which applications you run.