312-50V12 Question #149: Real Exam Question with Answer & Explanation

Question

A large enterprise has been experiencing sporadic system crashes and instability, resulting in limited access to its web services. The security team suspects it could be a result of a Denial of Service (DoS) attack. A significant increase in traffic was noticed in the network logs, with patterns suggesting packet sizes exceeding the prescribed size limit. Which among the following DoS attack techniques best describes this scenario?

Options

• ASmurf attack
• BUDP flood attack
• CPulse wave attack
• DPing of Death attack

Explanation

The scenario describes a Denial of Service (DoS) attack characterized by a significant increase in traffic and network logs showing packet sizes exceeding the prescribed limit, leading to system crashes and instability.

Common mistakes.

• A. A Smurf attack involves sending ICMP echo requests to a network's broadcast address using a spoofed source IP, causing all hosts to reply to the victim, but it does not primarily focus on oversized packets.
• B. A UDP flood attack involves overwhelming a target with a high volume of User Datagram Protocol (UDP) packets, often to random ports, but its defining characteristic is not packets exceeding the prescribed size limit.
• C. A Pulse wave attack is a type of Distributed Denial of Service (DDoS) attack characterized by alternating periods of intense traffic bursts followed by lulls, designed to bypass traditional volumetric attack detection, but it does not specifically involve oversized packets.

Concept tested. Denial of Service (DoS) attack types and characteristics

Reference. https://learn.microsoft.com/en-us/azure/ddos-protection/ddos-attack-types

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