What is the best defense against Distributed DoS Attack?

A.
patch your systems.

B.
run a virus checker.

C.
run an anti-spy software.

D.
find the DoS program and kill it.

E.
None of the choices.

Explanation:
Distributed DoS Attack is a network-based attack from many servers used remotely to send packets. Examples
of tools for conducting such attack include TFN, TFN2K, Trin00, Stacheldracht, and variants. The best defense
is to make sure all systems patches are up-to-date. Also make sure your firewalls are configured appropriately.