• Vipul Chidri
• V S Balasubramani
• Syed Sadath Ali
• Shrikrishna S Hegde
• Pradeep Sadanand

Distributed Denial-of-service (DDoS) attack is one of the most dangerous threats that could cause devastating effects on the Internet. DDoS attacks started in the late 1990s but the influence of it was realized by people only when the big establishments and corporations were hit by these attacks. Numerous tools are available that can perform DDoS attacks from thousands of compromised hosts and can take down any connection, any link on the Internet by just a few command keystrokes. Distributed Denial of Service (DDoS) attacks are a virulent attack on the availability of Internet services and resources. DDoS attackers intrude huge number of computers by exploiting software vulnerabilities and set up DDoS attacks. These computers are then invoked to initiate corresponding, large-scale attack against one or more victim systems. It is desirable to develop all-inclusive DDoS solutions that defend against known and imminent DDoS attack variants. However, this requires a complete understanding of the scope and techniques used in different DDoS attacks. This paper proposes new taxonomies to categorize DDoS attack networks, to classify the diverse techniques used in a DDoS attack. It proposes classes of countermeasures that target the DDoS problem. This work is intended to stimulate research into effective and efficient defenses and detection mechanisms for DDoS attacks, and to assist in creating comprehensive solutions that will provide generic and effective approach to countering known and derivative DDoS attacks.

"A Survey on Distributed Denial-of-service Attacks and Defense Mechanisms", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.2, Issue 4, page no.1321-1325, April-2015, Available :http://www.jetir.org/papers/JETIR1504089.pdf

"A Survey on Distributed Denial-of-service Attacks and Defense Mechanisms", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.2, Issue 4, page no. pp1321-1325, April-2015, Available at : http://www.jetir.org/papers/JETIR1504089.pdf