Ethical hacking involves testing to see if an organization's network is vulnerable to outside threats. Denial-of-service (DoS) attacks are one of the biggest threats out there. Being able to mitigate DoS attacks is one of the most desired skills for any IT security professional-and a key topic on the Certified Ethical Hacker exam. Watch this course to learn what exactly a DoS attack is and the types of techniques hackers use to cripple wired and wireless networks, applications, and services on the infrastructure, such as FTP and SIP. Learn how attackers are using botnet-driven distributed DoS (DDoS) attacks to overwhelm defenses. Author and IT security expert Malcolm Shore also explores the rising threat of ransomware like CryptoLocker, and mitigation techniques for detecting and defeating DoS attacks.