%u2022 In your own words, describe both DoS and DDoS attacks and provide an exam

Question

%u2022 In your own words, describe both DoS and DDoS attacks and provide an example that details an actual DoS or DDoS attack. Identify the threats and vulnerabilities from the example you provided and identify how they could have been mitigated.

%u2022 The use of a Trojan horse or Trojan by an attacker to steal data or gain privileged remote access to a computer is on the rise. Provide in detail an example of the use of Trojans for malicious purposes. Identify threats and vulnerabilities that could allow the execution of a Trojan horse attack and identify how they could have been mitigated.

Explanation / Answer

DDOS, short for Distributed Denial of Service, is a type of DOS attack where multiple compromised systems -- which are usually infected with a Trojan -- are used to target a single system causing a Denial of Service (DoS) attack. Victims of a DDoS attack consist of both the end targeted system and all systems maliciously used and controlled by the hacker in the distributed attack.

According to this report on eSecurityPlanet, in a DDoS attack, the incoming traffic flooding the victim originates from many different sources %u2013 potentially hundreds of thousands or more. This effectively makes it impossible to stop the attack simply by blocking a single IP address; plus, it is very difficult to distinguish legitimate user traffic from attack traffic when spread across so many points of origin

DOS Short for denial-of-service attack, a type of attack on a network that is designed to bring the network to its knees by flooding it with useless traffic. Many DoS attacks, such as the Ping of Death and Teardrop attacks, exploit limitations in the TCP/IP protocols. For all known DoS attacks, there are software fixes that system administrators can install to limit the damage caused by the attacks. But, like viruses, new DoS attacks are constantly being dreamed up by hackers.

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