DoS-DDoS: TAXONOMIES OF ATTACKS,COUNTERMEASURES, AND WELL-KNOWN DEFENSE MECHANISMS IN CLOUD ENVIRONMENT

Cloud computing has become a suitable provider of services for organizations as well as individuals through the Internet. Generally, these services become unavailable because of Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks that can deny the legitimate users access to the service delivered by cloud. Taxonomy is an important opportunity for researchers and cloud service providers. Therefore, it provides researchers with a general view about some contributions to understand and ameliorate their limitations and helps cloud service providers to select the best defense strategy to protect their cloud service against DoS and DDoS attacks. In this article, we present taxonomies of DoS and DDoS attacks in cloud environment, countermeasures, and highlight their solutions with another taxonomy of well-known defense mechanisms.