GCIH · Question #59
Which of the following attacks are examples of Denial-of-service attacks (DoS)? Each correct answer represents a complete solution. Choose all that apply.
The correct answer is A. Fraggle attack B. Smurf attack D. Ping flood attack. Fraggle, Smurf, and ping flood attacks all overwhelm a target with traffic to deny service, while the Birthday attack is a cryptographic collision attack unrelated to availability.
Question
Which of the following attacks are examples of Denial-of-service attacks (DoS)? Each correct answer represents a complete solution. Choose all that apply.
Options
- AFraggle attack
- BSmurf attack
- CBirthday attack
- DPing flood attack
How the community answered
(65 responses)- A91% (59)
- C9% (6)
Why each option
Fraggle, Smurf, and ping flood attacks all overwhelm a target with traffic to deny service, while the Birthday attack is a cryptographic collision attack unrelated to availability.
A Fraggle attack is a UDP-based amplification DoS attack where the attacker sends spoofed UDP packets to a network broadcast address, causing all hosts on the subnet to send replies to the victim's IP and flood it with traffic.
A Smurf attack is an ICMP-based amplification DoS attack where the attacker sends spoofed ICMP echo requests to a broadcast address so that every host on the network replies to the victim, overwhelming its connection.
A Birthday attack is a cryptographic attack that exploits hash collision probability to find two different inputs that produce the same hash digest; it targets data integrity rather than service availability and is not a DoS technique.
A ping flood attack is a direct DoS attack that sends a continuous high-volume stream of ICMP echo request packets to exhaust the target's bandwidth or CPU resources and render it unresponsive.
Concept tested: Identifying DoS attack types vs. cryptographic attacks
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