An Organization's Help Desk Is Flooded with Phone Calls from Users

question 122

Multiple Choice

An organization's help desk is flooded with phone calls from users stating they can no longer access certain websites. The help desk escalates the issue to the security team, as these websites were accessible the previous day. The security analysts run the following command: ipconfig /flushdns , but the issue persists. Finally, an analyst changes the DNS server for an impacted machine, and the issue goes away. Which of the following attacks MOST likely occurred on the original DNS server?

• A) DNS cache poisoning
• B) Domain hijacking
• C) Distributed denial-of-service
• D) DNS tunneling

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Definitions:

Sedimentary Rock

Rock formed by the accumulation and compaction of sediments, often containing fossils and layers that record Earth's history.

Loose Sediment

Unconsolidated particles of rock, soil, or minerals deposited by water, wind, or ice.

Sediment Production

The process of generating material, like sand, silt, and clay, that can be transported by water, wind, or ice, and deposited as sediment.

Chemical Weathering

Chemical reactions that affect a rock or other material by breaking down minerals and removing soluble material from the rock.