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

In the Threat Intelligence Sharing Model, the Public Tier is used when information is of low sensitivity and can be shared widely across communities, industry groups, or the public domain.

This tier is ideal for sharing generalized threat data, advisories, or non-sensitive indicators that do not pose risks to the organization if disclosed.

Why the Other Options Are Incorrect:

Private tier: Used for highly sensitive intelligence shared only within a small internal group or trusted partners.

Targeted tier: Shared with specific, predefined organizations or partners with a need-to-know basis.

Multitier: Involves multiple sharing levels but is not a standard individual tier type.

Conclusion:

Henry should use the Public Tier, suitable for broader sharing of low-sensitivity information.

Final Answer: B. Public tier

Explanation Reference (Based on CTIA Study Concepts):

As per CTIA’s “Threat Intelligence Sharing Framework,” the public tier enables dissemination of low-sensitivity threat intelligence to trusted communities for collaborative defense.

When attackers or analysts search job postings on online job portals, they often uncover technical details inadvertently shared by organizations.

Job listings frequently mention:

Hardware and software used (e.g., “experience with Cisco firewalls, Windows Server 2019”).

Network details and tools (e.g., “knowledge of LAN/WAN, AWS, Azure”).

Security technologies (e.g., “SIEM tools like Splunk or QRadar”).

This information can help analysts identify the technological footprint of the company, which is valuable during threat profiling or reconnaissance.

Why the Other Options Are Incorrect:

B. Top-level domains and subdomains: Obtained through DNS enumeration tools, not job sites.

C. Open ports and services: Found through active scanning tools like Nmap, not via job postings.

Conclusion:

Flora can obtain hardware, software, and network-related information from online job listings.

Final Answer: A. Hardware and software information, network-related information, and technologies used by the company

Explanation Reference (Based on CTIA Study Concepts):

CTIA recognizes online job sites as OSINT sources that can reveal technical environment details about organizations.

A model where all threat data is collected, analyzed, and distributed through a single central hub defines a Centralized Exchange Architecture.

In this architecture:

All participants send their data to a central system.

The central hub processes, correlates, and redistributes intelligence.

It ensures uniform analysis, consistency, and efficient management.

Why the Other Options Are Incorrect:

A. Decentralized: Each participant shares data directly with others without a central hub.

B. Federated: Each organization maintains its own data but participates in shared analysis through agreed protocols.

C. Hybrid: Combines elements of centralized and decentralized systems for flexibility.

Conclusion:

The described setup represents a Centralized Exchange Architecture.

Final Answer: D. Centralized exchange architecture

Explanation Reference (Based on CTIA Study Concepts):

CTIA classifies centralized architectures as systems that collect and distribute threat data through a single authoritative node.