Pass the Cisco CyberOps Associate 200-201 Questions and answers with CertsForce

The source IP address from an audit log that indicates a session which may have exploited a vulnerability is considered corroborative evidence. This type of evidence supports other evidence that suggests a security breach occurred. In the context of cybersecurity, corroborative evidence can help establish that an attack was carried out and can be used in conjunction with other data points to build a case during an investigation.

References := The Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) training material discusses the types of data needed to investigate security incidents, which includes understanding the role of different types of evidence in building a security incident case1.

Rule-based detection methods rely on predefined rules and patterns that are known beforehand. These rules are created based on prior knowledge of what constitutes normal and abnormal behavior.

Statistical detection, on the other hand, involves analyzing data to identify anomalies. It is based on assumptions about what normal behavior looks like and uses statistical methods to detect deviations from this norm.

Rule-based systems are typically straightforward but may miss novel attacks that do not match existing rules.

Statistical methods can detect previously unknown threats by recognizing patterns that deviate from established baselines but may produce more false positives.

References

Intrusion Detection Systems (IDS) Concepts

Comparative Studies on Rule-based and Statistical Anomaly Detection

Understanding Anomaly Detection in Network Security

The defense-in-depth strategy is a layered approach to security that includes multiple defensive measures to protect against threats. Dividing the network into parts (B) helps isolate potential breaches, making it harder for an attacker to move laterally across the network. Implementing the patch management process (E) ensures that systems are up-to-date with the latest security patches, reducing vulnerabilities that attackers could exploit.

 Tampered images are disk images that have been modified or altered in some way after they were captured from the original source. Tampered images may have different stored and computed hash values, which indicate that the integrity of the image has been compromised. Tampered images are not reliable or valid sources of evidence for forensic investigations, as they may contain false or misleading information. Untampered images are disk images that have not been changed or manipulated after they were acquired from the original source. Untampered images have the same stored and computed hash values, which verify that the image is an exact copy of the original disk. Untampered images are used for forensic investigations, as they preserve the original state and content of the disk and provide accurate and trustworthy evidence. References:

Contrasting tampered and untampered disk images

What is a difference between tampered and untampered disk images?

The exhibit shows an event log file with fields like date time action protocol src-ip dst-ip src-port dst-port etc., which are typical in Intrusion Detection Systems (IDS) or Intrusion Prevention Systems (IPS). These systems monitor network traffic for suspicious activity or violations of policies and produce reports as seen in the exhibit. References: Cisco Certified CyberOps Associate Overview

The log in the exhibit is generated by a firewall. It shows a deny action taken on TCP traffic, specifying the source and destination addresses and ports, which is characteristic of firewall logs. Firewalls are designed to control incoming and outgoing network traffic based on predetermined security rules, and this log entry reflects the enforcement of such a rule.

References :=

Cisco’s official documentation on firewall technologies and their log formats.

The CDFS (Compact Disc File System) format is associated with the ISO 9660 standard, which is a file system for optical disc media. It is commonly used in Windows systems for CDs. When a security expert works on an ISO file saved in CDFS format, it typically indicates that the data was prepared or copied using a Windows-based system. This is because CDFS is the file system that Windows uses to read and write CDs, and the ISO file is an image of that CD data1.

References :=

Understanding CDFS (Compact Disc File System): A Comprehensive Guide2.

What type of evidence is this file? - VCEguide.com