Cisco 300-710 Online Access

Based on the Attacks Risk Report, DNS is associated with a high number of impact events (16). DNS traffic is critical for network operations but can also be exploited for malicious activities such as DNS tunneling, DDoS attacks, and data exfiltration. To improve security, the security engineer should focus on inspecting DNS traffic. This involves deploying DNS security solutions and monitoring DNS traffic for anomalies to detect and mitigate potential threats.

Steps:

Implement DNS security tools such as DNS filtering, DNSSEC, and DNS anomaly detection.

Configure the firewall to inspect DNS traffic for malicious activities.

Regularly analyze DNS logs to identify and respond to threats.

This action addresses a significant risk identified in the report and helps to mitigate potential attacks exploiting DNS.

Intrusion events provide the detection evidence needed to understand which signatures fired, the affected source and destination addresses, event severity, protocol information, and other indicators associated with the suspected compromise. Host connections provide the corresponding network context, allowing the analyst to determine which systems communicated, when the sessions occurred, and which ports, applications, or protocols were involved. Together, these details connect security detections with the traffic flows that produced them and support reconstruction of the incident. Client applications by user and user connections are useful when the investigation is primarily identity-focused, but they do not provide the same direct combination of exploit evidence and host-level network activity. The number of attacked machines is an aggregate measurement and lacks the granular information necessary to investigate the suspicious communications and determine their cause.