DoS attacks: A simulation study

Today, owing to the Openness nature of the Internet and Defects in the TCP/IP protocol, the Internet has become more vulnerable to attackers for attacking. One of the serious threats to the Internet is Denial-of-Service attacks where any number of attackers can disrupt legitimate communication between any parties. Nowadays so many techniques are used to prevent the DoS attacks. However these techniques defend the DoS attacks from the attacker but they also have some vulnerabilities and issues which have been described. In this paper, DoS attack is observed in simulation environment with detailed analysis followed by protection mechanism with description, we have compared all DoS attack prevention mechanisms such as TVA, SIFF, Pushback and AITF. Simulation experimental results show that a better understanding of DoS attacks and efficient and effective algorithms can be developed.