Denial of Service and Distributed Denial of Service attacks may have two intentions. One can be to exhaust the resources of the targeted host, or to exhaust the bandwidth of a particular link. This bandwidth attack is called a flooding attack which uses a technique of sending a lot of packets down a particular link which was designed for only a certain amount of bandwidth according to the organization’s Information System needs.
Boycott Novel was hit with DDOS attacks in May of 2009. What was interesting about this article is that it states that you can do whatever you want but you will not be able to protect yourself from these attacks. The best you can do is try to see where they are coming from and report to the authorities. It is pretty scary for businesses who do all their business through their Web Pages and the Internet.
http://blogs.computerworld.com/burying_the_truth_boycott_novell_hit_by_denial_of_service_attack?page=1
http://practical-tech.com/network/brace-yourself-ddos-attacks-ahead/