What are indications of a network-based DoS attack?

A network-based Denial of Service (DoS) attack aims to disrupt the normal functioning of a targeted server, service, or network by overwhelming it with a flood of traffic or requests. Recognizing the manifestations of such an attack is crucial for incident handlers in order to respond appropriately.

Every choice presented identifies potential indicators of a network-based DoS attack. Log entries from the operating system can reveal unusual patterns or large volumes of requests, signaling that something anomalous is occurring. Undefined connection losses might indicate that legitimate users are being blocked from accessing the network resources due to the saturation caused by the attack. An increase in network bandwidth utilization is a direct symptom, as the attacker floods the network with traffic, which can lead to slower response times or outages.

Therefore, selecting the option that encapsulates all these indicators reflects a comprehensive understanding of the signs of a network-based DoS attack. All the listed elements form a cohesive picture, helping incident handlers to identify and confirm the occurrence of such attacks effectively.