Which of the following statements accurately describe Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks? Select three answers.

A. In both DoS and DDoS attacks, every part of the network must be overloaded for the attacks to be successful.
B. A network device experiencing a DoS attack is unable to respond to legitimate users.
C. A DDoS attack involves multiple hosts carrying out the attack.
D. A DoS attack involves one host conducting the attack.

Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks are both methods to disrupt network services, but they differ in their approach. In a DoS attack, a single host overwhelms a network device with excessive queries, while in a DDoS attack, multiple hosts work together to flood a target, making it unreachable.

The main aim of a DoS attack is to prevent legitimate users from accessing resources by overloading the system. Contrarily, a DDoS attack involves using a network of compromised computers or 'zombies' to launch a coordinated assault, making it difficult to mitigate and trace back to the original source.

In contrast to the misconception mentioned, in both DoS and DDoS attacks, it is not necessary for every part of the network to be overloaded for the attacks to succeed. Targeting specific vulnerable points can also effectively disrupt network services.

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