312-85 Exam Dumps : Certified Threat Intelligence Analyst (CTIA)

Centralized storage architecture refers to a system where data is stored in a localized system, server, or storage hardware. This type of storage is capable of holding a limited amount of data in its database and is locally available for data usage. Centralized storage is commonly used in smaller organizations or specific departments within larger organizations where the volume of data is manageable and does not require the scalability offered by distributed or cloud storage solutions. Centralized storage systems simplify data management and access but might present challenges in terms of scalability and data recovery.

Passive DNS monitoring involves collecting data about DNS queries and responses without actively querying DNS servers, thereby not altering or interfering with DNS traffic. This technique allows analysts to track changes in DNS records and observe patterns that may indicate malicious activity. In the scenario described, Enrique is employing passive DNS monitoring by using a recursive DNS server to log the responses received from name servers, storing these logs in a central database for analysis. This approach is effective for identifying malicious domains, mapping malware campaigns, and understanding threat actors' infrastructure without alerting them to the fact that they are being monitored. This method is distinct from active techniques such as DNS interrogation or zone transfers, which involve sending queries to DNS servers, and dynamic DNS, which refers to the automatic updating of DNS records.

The "known unknowns" stage in cyber-threat intelligence refers to the phase where an analyst has identified threats but the specific details, implications, or full nature of these threats are not yet fully understood. Michael, in this scenario, has obtained information on threats and is in the process of analyzing this information to understand the nature of the threats better. This stage involves analyzing the known data to uncover additional insights and fill in the gaps in understanding, thereby transitioning the "unknowns" into "knowns." This phase is critical in threat intelligence as it helps in developing actionable intelligence by deepening the understanding of the threats faced.