212-89 Exam Dumps : EC Council Certified Incident Handler (ECIH v3)

The described symptoms—numerous incomplete TCP connections consuming server resources—are characteristic of a SYN flood attack, a denial-of-service technique targeting the transport layer. In such attacks, attackers send SYN packets without completing the TCP handshake, leaving servers overwhelmed with half-open connections.

ECIH network incident handling guidance emphasizes rapid identification and containment of DoS conditions to preserve service availability. By configuring the router to validate connection requests (for example, using SYN cookies or proxy validation), illegitimate handshake attempts are filtered before reaching the server.

Option A involves payload inspection, which is irrelevant here. Option B relates to authentication attacks, which require completed connections. Option D is a detection activity, not mitigation.

Therefore, the purpose of Sophia’s action was to block SYN flood attempts, making Option C correct.

Email Dossier is a tool designed to assist in the investigation of email incidents by analyzing and validating email headers and providing detailed information about the origin, routing, and authenticity of an email. When Michael is tasked with handling an email incident and needs to check the validity of an email received from an unknown source, Email Dossier can be utilized to trace the email's path, assess its credibility, and identify potential red flags associated with phishing or other malicious email-based attacks.

An active assessment involves using automated tools to scan and probe the network actively to identify hosts, services, and vulnerabilities. This type of assessment directly interacts with the network components to gather information about the existing security posture, unlike passive assessments, which analyze traffic without sending packets to the target systems. Dickson's approach, employing automated tools to identify the network's hosts, services, and vulnerabilities, fits the definition of an active assessment. This method provides a more immediate understanding of the network's vulnerabilities, allowing for timely remediation actions.