GSEC 401.2 Defense In Depth Study
Guide Test with 100% Correct Answers.
Inbound Network Traffic - CORRECT ANSWER * Monitor Inbound network prevention
Outbound Network Traffic - CORRECT ANSWER * Monitor Outbound network detection
* Majority of problems are outbound
defense in depth - CORRECT ANSWER * Diversify to keep the vulnerabilities at a minimum
Risk (Formula) - CORRECT ANSWER Threat x Vulnerability (to that threat)
Three TOP 20 Lists (Outbound Traffic) - CORRECT ANSWER 1) Number Connections
2) Length of Connections
3) Amount of Data
------------------------
(High false positives, but increase the accuracy of Vulnerabilities)
4a) Percent of Encrypted Traffic
4b) Destination IP Address
Risk Analysis Questions - CORRECT ANSWER * Before a company spends a dollar of it's money or a
minute of its time; answer the 3 questions
-------------
1) What is the *Risk*
2) Is it the *Highest Priority* risk
3) *Cost Effective* way of reducing the risk
Top 5 List of Threats - CORRECT ANSWER Critical Data and Process that support it
Likely Threats
,Most likely Vulnerabilities
Questions for CEOs - CORRECT ANSWER What are the things that worry you most?
What could cause you to be removed from the board?
What keeps you up at night?
Reduce Risk - CORRECT ANSWER To reduce risk lets reduce Vulnerabilities
3 Goals of Security (CIA Triad) - CORRECT ANSWER 1) Confidentiality / Disclosure
2) Integrity / Alteration
3) Availability / Destruction
Confidentiality vs Disclosure - CORRECT ANSWER Only shared among authorized persons or
organisations
Integrity vs Alteration - CORRECT ANSWER Authentic an complete.
Sufficient and Accurate
Trustworthy and reliable
Availability vs Destruction - CORRECT ANSWER Accessible when needed by those who need it
Network Visibility Tree - CORRECT ANSWER * Breakdown by IP Address and Port
ex 10.0.0.X
/\
10.0.0.3 10.0.0.10
/|\/|\
23 110 5150 43 210 443
* Identify unnecessary use of ports
, 4 approaches to Defense In Depth - CORRECT ANSWER 1) Uniform Protection
2) Protected Enclaves
3) Information Centric
4) Threat Vector Analysis
Uniform Protection - CORRECT ANSWER 1) Most common approach to DiD
2) Firewall, VPN, Intrusion, Detection, Antivirus, Patching
3) All parts of the organization receive equal protection
4) Treats all the systems the same
Protected Enclaves - CORRECT ANSWER 1) Work groups that require additional protection are
segmented from the rest of the internal organization
2) Restricting access to critical segments
3) Internal Firewalls
4) VLANs and ACLs
Information Centric - CORRECT ANSWER 1) Identify critical assets and provide layered protection
2) Data is accessed by applications
3) Applications reside on hosts
4) Hosts operate on networks
Vector-Oriented - CORRECT ANSWER 1) The threat requires a vector to cross the vulnerability
2) Stop the ability of th threat to use the vector:
a) USB Thumb drives - Disable USB
b) Auto Answer Modems - Digital Phone PBX
Viruses - CORRECT ANSWER * Typically targeted at users
* requires an executable
Guide Test with 100% Correct Answers.
Inbound Network Traffic - CORRECT ANSWER * Monitor Inbound network prevention
Outbound Network Traffic - CORRECT ANSWER * Monitor Outbound network detection
* Majority of problems are outbound
defense in depth - CORRECT ANSWER * Diversify to keep the vulnerabilities at a minimum
Risk (Formula) - CORRECT ANSWER Threat x Vulnerability (to that threat)
Three TOP 20 Lists (Outbound Traffic) - CORRECT ANSWER 1) Number Connections
2) Length of Connections
3) Amount of Data
------------------------
(High false positives, but increase the accuracy of Vulnerabilities)
4a) Percent of Encrypted Traffic
4b) Destination IP Address
Risk Analysis Questions - CORRECT ANSWER * Before a company spends a dollar of it's money or a
minute of its time; answer the 3 questions
-------------
1) What is the *Risk*
2) Is it the *Highest Priority* risk
3) *Cost Effective* way of reducing the risk
Top 5 List of Threats - CORRECT ANSWER Critical Data and Process that support it
Likely Threats
,Most likely Vulnerabilities
Questions for CEOs - CORRECT ANSWER What are the things that worry you most?
What could cause you to be removed from the board?
What keeps you up at night?
Reduce Risk - CORRECT ANSWER To reduce risk lets reduce Vulnerabilities
3 Goals of Security (CIA Triad) - CORRECT ANSWER 1) Confidentiality / Disclosure
2) Integrity / Alteration
3) Availability / Destruction
Confidentiality vs Disclosure - CORRECT ANSWER Only shared among authorized persons or
organisations
Integrity vs Alteration - CORRECT ANSWER Authentic an complete.
Sufficient and Accurate
Trustworthy and reliable
Availability vs Destruction - CORRECT ANSWER Accessible when needed by those who need it
Network Visibility Tree - CORRECT ANSWER * Breakdown by IP Address and Port
ex 10.0.0.X
/\
10.0.0.3 10.0.0.10
/|\/|\
23 110 5150 43 210 443
* Identify unnecessary use of ports
, 4 approaches to Defense In Depth - CORRECT ANSWER 1) Uniform Protection
2) Protected Enclaves
3) Information Centric
4) Threat Vector Analysis
Uniform Protection - CORRECT ANSWER 1) Most common approach to DiD
2) Firewall, VPN, Intrusion, Detection, Antivirus, Patching
3) All parts of the organization receive equal protection
4) Treats all the systems the same
Protected Enclaves - CORRECT ANSWER 1) Work groups that require additional protection are
segmented from the rest of the internal organization
2) Restricting access to critical segments
3) Internal Firewalls
4) VLANs and ACLs
Information Centric - CORRECT ANSWER 1) Identify critical assets and provide layered protection
2) Data is accessed by applications
3) Applications reside on hosts
4) Hosts operate on networks
Vector-Oriented - CORRECT ANSWER 1) The threat requires a vector to cross the vulnerability
2) Stop the ability of th threat to use the vector:
a) USB Thumb drives - Disable USB
b) Auto Answer Modems - Digital Phone PBX
Viruses - CORRECT ANSWER * Typically targeted at users
* requires an executable
