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Date: April. 2010
Abstract
Distribute denial of service (DDoS) poses a serious threat to the current Internet. Due to the various attacks, many kinds of defense 代写留学生论文mechanisms have been proposed. However, there are some defects in the defense mechanisms themselves or the mechanisms are not suitable to deploy in the whole Internet. As a result， there is not a perfect DDoS defense mechanism. This paper presents the categories of DDoS attacks and DDoS defense mechanisms.Then for future research, we consider about the prospect of DDoS defense mechanisms and the challenges that the DDoS defense mechanisms will face in future.
Keywords: DDoS; DDoS defense mechanisms;

Catalogue
CHAPTER 1 INTRODUCTION 1
CHAPTER 2 BACKGROUND INFORMATION 2
CHAPTER 3 A TAXONOMY OF DDOS ATTACK 3
3.1 WHAT IS DDOS 3
3.2 A TAXONOMY OF DDOS ATTACK 4
3.2.1 IP LAYER ATTACK 4
3.2.2 TRANSMISSION LAYER ATTACK 5
3.2.3 APPLICATION LAYER ATTACK 6
3.2.3 OTHER TAXONOMY OF DDOS 7
3.3 DDOS CHARACTERISTICS 8
CHAPTER 4 A TAXONOMY OF DDOS DEFENSE MECHANISMS 9
4.1 SOURCE-END REACTION 9
4.1.1 DEFENSE AGAINST SPOOFED IP TRAFFIC 9
4.1.2 BOTNET 11
4.2 VICTIM-END REACTION 11
4.3 INTERMEDIATE NETWORK REACTION 12
4.4 OTHER TAXONOMY OF DDOS DEFENSES 14
CHAPTER 5 THE CHALLENGE OF DDOS DEFENSE MECHANISM 16
CHAPTER 6 FUTURE DDOS MECHANISMS 17
CONCLUSION 18
REFERENCES 19
ACKNOWLEDGEMWNTS 21

CHAPTER 1 INTRODUCTION
Distribute denial of service (DDoS) attack poses a serious threat to the Internet, and many defense mechanisms have been proposed to solve the problem. However, it is very difficult to devise a perfect DDoS defense mechanism.
In February, 2000, Yahoo became the first web site which suffered from the DDoS attack [1]. The company tried to provide better service, but users could not even surf on its website. After the attacks, the company found that security loopholes had exited in the systems of the company before they published the security problems. EBay and Amazon suffered similar attacks after the attack event of Yahoo. DDoS attack has successfully damaged the services and finance of the companies. In September, 2007, according to the report of Artor [2], Botnet is the most harmful threat to the ISP. DDoS attack is the second most harmful threat to the ISP. Moreover, DDoS attack usually takes advantage of Botnet to attack.
The DDoS attack is getting more complex, and has reached the point where it is difficult to see the nature [3] .The reasons are as follows: First, it prevents us from understanding the DDoS phenomenon as a whole. For example, IP spoofing has often been implemented by DDoS attacks to conceal attack sources and dilute localities in flooding traffic. Second, it is hard to tell which strategy is better.
In this paper, we sum up the taxonomy of DDoS attacks and the taxonomy of DDoS defense strategies. We further analyze the merit and shortcoming of those strategies. Since deployment of DDoS defense m本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。