200-201 Exam Questions Tutorials

 The discrepancy described suggests that the system had a Host Intrusion Detection System (HIDS) installed. HIDS are designed to monitor and analyze the internals of a computing system for signs of intrusion and policy violations. While they can detect unauthorized activities, they do not take direct action to stop an attack; this is typically the role of an intrusion prevention system. Therefore, the alert was generated, but no mitigation action was taken because the HIDS does not have the capability to intervene.

References := The Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course material covers the functions and limitations of various security systems, including HIDS, and their role within a Security Operations Center (SOC)1.

Digital certificates are electronic documents that use public key cryptography to verify the identity and authenticity of the sender and the receiver of encrypted communications. Digital certificates are issued and signed by trusted entities called certificate authorities (CAs), and they contain information such as the public key, the name, and the expiration date of the certificate. Digital certificates enable network security devices to decrypt perimeter traffic and inspect it for command and control communications or other malicious activity. References := Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) - Cisco, page 51.

Digital certificates are essential for decrypting ingress and egress perimeter traffic, as they provide the necessary encryption keys for secure communications. By using digital certificates, network security devices can inspect the decrypted traffic to detect any malicious outbound communications that may indicate command-and-control activity.