156-21581 Exam QuestionsBrowse all questions from this exam

156-21581 Exam - Question 189


Which type of attack can a firewall NOT prevent?

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Correct Answer: D

Firewalls are designed to filter traffic based on predefined security rules and can effectively prevent attacks such as Buffer Overflow, SYN Flood, and SQL Injection by blocking malicious packets and traffic patterns. However, firewalls cannot prevent Network Bandwidth Saturation, which occurs when an excessive amount of traffic consumes all available bandwidth, leading to network congestion. This type of attack, often associated with Distributed Denial of Service (DDoS), requires different mitigation strategies such as traffic rate limiting, DDoS protection services, and increased bandwidth capacity.

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Cedric567
Apr 26, 2023

anyone can confirm this? i found noting for this in any documenation from the ccsa training. Seems weird to me that they would ask questions to topics which are not in the dokumentation

vladdar
Jun 4, 2023

seems like logic answer, meaning that you cannot defend against DDoS attacks with firewall if the DDoS overutilize your uplink, others are signature attacks againt which you can defend using IPS

darkboy32Option: C
Jul 31, 2023

SQL injection, a common firwall is not able to prevent that kind of attacks, it's necessary a WAF

nenotronixOption: D
Mar 9, 2024

Answer D is correct [Network Bandwidth Saturation] as this is a common issue/phonomena in poorly designed networks. it's not an attack. the question clearly states "attack"