How can network traffic analysis help in preventing DoS attacks?

Network traffic analysis plays a crucial role in identifying spikes in traffic patterns, which is essential for preventing DoS (Denial of Service) attacks. These attacks typically involve overwhelming a target system, server, or network with a flood of traffic, rendering it unavailable to legitimate users. By closely monitoring and analyzing traffic, organizations can establish baselines for normal activity and recognize unusual spikes that may indicate the onset of a DoS attack.

When a significant increase in traffic is detected beyond what is expected, network administrators can investigate further to discern whether this surge is due to legitimate user activity or if it points to malicious intent. Early detection allows for timely mitigation strategies, such as rate limiting, filtering traffic, or implementing other security measures to absorb or redirect the flood of data away from critical services, thus preserving availability for legitimate users.

In this context, the correct choice emphasizes the proactive aspect of network traffic analysis in identifying and responding to potential threats before they escalate into full-blown attacks. This capability is vital for maintaining the integrity and availability of network resources.