DDOS Attacks and Possible Countermeasures : A Review

The exceptional success & growth of internet has changed many traditional services such as banking, educational, groceries, shopping and many more. Now they are progressively working towards the safe and fast process. The present era, can be said as the era of the internet as the world is highly dependent on the internet which can be considered as the main infrastructure for the growth of global information society. Therefore, the availability of the internet is the perilous for social & economic growth of society. However traditional architecture of the internet is vulnerable which therefore provides the window of opportunity to the lots of the attack. Distributed denial of service (DDoS) attack is one of those attacks, which poses an enormous threat to the availability of the internet. The cloud milieu has many security challenges among which DDoS attacks have maximum priority. Within Cloud Security issues being dominant for the private enterprises, the denial of service attacks is rated as the highest priority threat. One of the immense bother before the researchers is to find the details of attack as many organization avoid to revel that they were attack due to the frighten of the defamation. DDoS exhaust victim’s bandwidth on service. In this paper an overview of distributed-denial-of-service, different types of attack, different types of techniques, and their countermeasures are reviewed.