Which of the following is a coordinated effort in which multiple machines attack a single victim or host with the intent to prevent legitimate service?
a. DoS
b. Masquerading
c. DDoS
d. Trojan horse
Answer: C
A distributed denial of service (DDoS) attack is similar to a denial-of-service (DoS) attack in that they both try to prevent legitimate access to services. However, a DDoS attack is a coordinated effort among many computer systems; therefore, answer A is incorrect. Masquerading involves using someone else's identity to access resources; therefore, answer B is incorrect. A Trojan horse is a program used to perform hidden functions; therefore, answer D is incorrect.
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Threats and Vulnerabilities
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