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​NIST Cybersecurity Framework (CSF)
Question 1: What is the NIST Cybersecurity Framework (CSF)?
Answer:
The NIST Cybersecurity Framework (CSF) is a cybersecurity framework developed by the National Institute of Standards and Technology (NIST) to help organizations manage and reduce cybersecurity risks.
Although originally created for U.S. federal agencies, it is widely adopted by private organizations because it is publicly available, flexible, and based on cybersecurity best practices.


Question 2: What are the objectives of the NIST Cybersecurity Framework?
Answer:
The NIST CSF helps organizations:
  • Describe their current cybersecurity posture.
  • Define their desired cybersecurity target state.
  • Identify and prioritize areas for improvement.
  • Measure progress toward cybersecurity goals.
  • Improve communication about cybersecurity risks among internal and external stakeholders.


Question 3: What are the three main components of the NIST Cybersecurity Framework?
Answer:
The NIST CSF consists of three major components:
  1. Framework Core
  2. Framework Implementation Tiers
  3. Framework Profiles


Question 4: What is the Framework Core?
Answer:
The Framework Core is the heart of the NIST CSF.
It organizes cybersecurity activities into five primary security functions that apply across all industries.
These functions are:
  • Identify (ID)
  • Protect (PR)
  • Detect (DE)
  • Respond (RS)
  • Recover (RC)
Each function is further divided into:
  • Categories
  • Subcategories
  • Informative references


Question 5: What are the five Framework Core functions?
Answer:
1. Identify (ID)
Understand the organization’s environment and manage cybersecurity risks.
Examples:
  • Asset management
  • Business environment
  • Governance
  • Risk assessment
  • Risk management strategy


2. Protect (PR)
Implement safeguards to protect systems and data.
Examples:
  • Identity and access management
  • Security awareness training
  • Data protection
  • Protective technologies
  • Maintenance


3. Detect (DE)
Identify cybersecurity events as quickly as possible.
Examples:
  • Continuous monitoring
  • Security monitoring
  • Detection processes


4. Respond (RS)
Take action after detecting a cybersecurity incident.
Examples:
  • Incident response planning
  • Communications
  • Analysis
  • Mitigation
  • Improvements


5. Recover (RC)
Restore systems and services after an incident.
Examples:
  • Recovery planning
  • Improvements
  • Communication with stakeholders


Question 6: What are the Framework Implementation Tiers?
Answer:
Implementation Tiers measure how mature an organization’s cybersecurity risk management practices are.
There are four maturity levels:
  • Tier 1 – Partial
  • Tier 2 – Risk Informed
  • Tier 3 – Repeatable
  • Tier 4 – Adaptive


Question 7: What is Tier 1 (Partial)?
Answer:
An organization at Tier 1 has:
  • Informal cybersecurity practices.
  • Reactive risk management.
  • Limited organization-wide awareness.
  • Security decisions made on a case-by-case basis.
  • Limited understanding of relationships with external partners and suppliers.


Question 8: What is Tier 2 (Risk Informed)?
Answer:
At Tier 2:
  • Management approves cybersecurity practices.
  • Risk management is recognized but not consistently implemented across the organization.
  • Organizational awareness of cybersecurity risk exists.
  • The organization understands some external relationships but not comprehensively.


Question 9: What is Tier 3 (Repeatable)?
Answer:
Organizations at Tier 3:
  • Have formally approved cybersecurity policies.
  • Consistently apply risk management across the organization.
  • Follow standardized cybersecurity procedures.
  • Understand their dependencies and relationships within the larger cybersecurity ecosystem.


Question 10: What is Tier 4 (Adaptive)?
Answer:
Organizations at Tier 4:
  • Continuously improve cybersecurity practices.
  • Learn from previous incidents.
  • Use predictive indicators to anticipate threats.
  • Maintain organization-wide risk management.
  • Share cybersecurity knowledge and contribute to the broader cybersecurity community.


Question 11: Summary of the Four Implementation Tiers (Note Form)
Tier 1 – Partial
  • Informal cybersecurity practices.
  • Reactive approach.
  • Limited cybersecurity awareness.
  • Minimal external collaboration.


Tier 2 – Risk Informed
  • Management-approved practices.
  • Some cybersecurity awareness.
  • Risk management not fully standardized.
  • Partial understanding of external relationships.


Tier 3 – Repeatable
  • Formal cybersecurity policies.
  • Standardized organization-wide processes.
  • Consistent risk management.
  • Good understanding of organizational dependencies.


Tier 4 – Adaptive
  • Continuous improvement.
  • Predictive cybersecurity practices.
  • Lessons learned drive improvements.
  • Strong collaboration inside and outside the organization.


Question 12: What is a Framework Profile?
Answer:
A Framework Profile describes how an organization applies the Framework Core based on its business requirements and risk tolerance.
Organizations commonly create:
  • Current Profile – describes the organization’s existing cybersecurity posture.
  • Target Profile – describes the desired future cybersecurity posture.
Comparing both profiles helps identify security gaps and prioritize improvements.


Question 13: Why is the NIST Cybersecurity Framework useful?
Answer:
The CSF provides organizations with a structured approach to:
  • Develop cybersecurity programs.
  • Assess current cybersecurity maturity.
  • Identify weaknesses.
  • Prioritize security improvements.
  • Evaluate cybersecurity performance over time.


Key Notes
NIST CSF Objectives
  • Describe current cybersecurity posture.
  • Define target cybersecurity posture.
  • Identify improvement opportunities.
  • Measure progress.
  • Improve cybersecurity communication.


Three Components
  • Framework Core
  • Implementation Tiers
  • Framework Profiles


Five Core Functions
  • Identify
  • Protect
  • Detect
  • Respond
  • Recover
Memory Tip: “I Protect Data, Respond, Recover.” (IDPRR)


Implementation Tiers
  • Tier 1: Partial (Reactive)
  • Tier 2: Risk Informed (Management aware)
  • Tier 3: Repeatable (Standardized)
  • Tier 4: Adaptive (Continuous improvement)


Framework Profiles
  • Current Profile = Current security state.
  • Target Profile = Desired security state.
  • Gap Analysis = Difference between current and target profiles.


Exam Tips
  • Framework Core = What cybersecurity activities should be performed.
  • Implementation Tiers = How mature an organization’s cybersecurity program is.
  • Framework Profiles = Where the organization is now vs. where it wants to be.
  • The NIST CSF is widely used in private industry, while the NIST RMF is primarily used by U.S. federal agencies.
  • The five Core Functions (Identify, Protect, Detect, Respond, Recover) are among the most frequently tested concepts on Security+ exams.











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