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CompTIA Security+ · CompTIA
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Sudden Traffic Surge: A DDoS attack floods the public network with excessive traffic (e.g., from botnets), overwhelming resources and making services unreachable despite being "up." Symptoms Match: Services are technically running but inaccessible to users. Network logs show abnormal traffic spikes.
inaccessible = Denial hence D.
DDoS is the correct answer because the sudden increase in network traffic leading to a web services outage is characteristic of a Distributed Denial of Service attack. This type of attack overwhelms the target's resources, making services inaccessible, even though they are still operational. DDoS attacks specifically aim to disrupt access by flooding the target with excessive traffic, matching the symptoms described in the scenario.