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Exam Code: 312-50v13

Exam Name Certified Ethical Hacker v13

Certification Provider: ECCouncil

Corresponding Certification: CEH

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ECCouncil 312-50v13 Practice Test 39

Question 380

At Timberline Foods, the supply-chain assurance team is conducting a coordinated processing-plant assessment under requirements for food safety and secure logistics. The team now needs objective retest evidence for: An organization conducts spear-phishing tests that disclose individual employee names publicly in a failure leaderboard. Which result BEST demonstrates successful remediation?

  1. Alerts are tied to validated suspicious behavior and routine external business scheduling is not indiscriminately blocked.
  2. Sensitive client data is blocked from unsanctioned tools while an approved sanitized workflow remains usable.
  3. A controlled deepfake-voice scenario fails to authorize a sensitive change without verified secondary approval.
  4. The assessment retains useful learning measures without exposing named employee results beyond approved reviewers.

Explanation

Correct Answer

D:

The assessment retains useful learning measures without exposing named employee results beyond approved reviewers. The observable result demonstrates that the documented condition, An organization conducts spear-phishing tests that disclose individual employee names publicly in a failure leaderboard. has been addressed. The planned remediation is: Use privacy-preserving coaching and aggregate performance metrics rather than public shaming in authorized simulations. This is a stronger validation than a saved ticket or unverified claim by Timberline Foods.

Incorrect Answers

A:

Alerts are tied to validated suspicious behavior and routine external business scheduling is not indiscriminately blocked. That observation would verify another scenario: An awareness report treats every externally sourced calendar invite as malicious without inspecting provenance or requested action. The corrective step for that other scenario is: Assess sender authenticity, context, links and intended actions before classifying potential calendar-based social engineering. But Timberline Foods is evaluating: An organization conducts spear-phishing tests that disclose individual employee names publicly in a failure leaderboard. The necessary outcome is: The assessment retains useful learning measures without exposing named employee results beyond approved reviewers.

B:

Sensitive client data is blocked from unsanctioned tools while an approved sanitized workflow remains usable. That observation would verify another scenario: An employee copies a confidential client list into an AI-powered writing assistant to create a presentation without an approved data policy. The corrective step for that other scenario is: Apply data-classification, sanctioned AI-tool boundaries and data-loss prevention before transferring sensitive content. But Timberline Foods is evaluating: An organization conducts spear-phishing tests that disclose individual employee names publicly in a failure leaderboard. The necessary outcome is: The assessment retains useful learning measures without exposing named employee results beyond approved reviewers.

C:

A controlled deepfake-voice scenario fails to authorize a sensitive change without verified secondary approval. That observation would verify another scenario: A customer-service trainee believes a support agent's voice proves identity because it sounds like a known manager. The corrective step for that other scenario is: Use out-of-band verification and authenticated workflow approvals rather than treating voice similarity as identity proof. But Timberline Foods is evaluating: An organization conducts spear-phishing tests that disclose individual employee names publicly in a failure leaderboard. The necessary outcome is: The assessment retains useful learning measures without exposing named employee results beyond approved reviewers.

Question 381

At Juniper Media, the digital-platform security team is conducting a scoped content-delivery assessment under requirements for rights enforcement and safe media workflows. The control assessment finds: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. Which action BEST addresses the documented security gap?

  1. Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections.
  2. Enforce input complexity, request budgets and backpressure at the expensive application endpoint.
  3. Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage.
  4. Apply application-layer rate limits, caching and upstream traffic protections while investigating the request pattern.

Explanation

Correct Answer

D:

Apply application-layer rate limits, caching and upstream traffic protections while investigating the request pattern. This directly addresses the authorized assessment finding: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The Juniper Media team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

Incorrect Answers

A:

Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections. This is an appropriate control for a different issue: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The Juniper Media finding instead concerns: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. It does not demonstrate the required correction. The decisive test remains: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

B:

Enforce input complexity, request budgets and backpressure at the expensive application endpoint. This is an appropriate control for a different issue: A load balancer handles HTTP floods but the internal API still crashes because a costly endpoint lacks request-level resource budgets. The Juniper Media finding instead concerns: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. It does not demonstrate the required correction. The decisive test remains: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

C:

Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage. This is an appropriate control for a different issue: A network operator activates a broad blackhole for an entire datacenter prefix after one endpoint is targeted by high traffic. The Juniper Media finding instead concerns: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. It does not demonstrate the required correction. The decisive test remains: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

Question 382

At Juniper Media, the digital-platform security team is conducting a scoped content-delivery assessment under requirements for rights enforcement and safe media workflows. An independent validation is requested for the original problem: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. Which result BEST demonstrates successful remediation?

  1. External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.
  2. Legitimate connections complete under controlled stress and half-open connection state stays within safe limits.
  3. The service stays within response-time targets under controlled load and suspicious request bursts are throttled.
  4. Legitimate high-volume requests remain serviceable while a synthetic abusive load is contained.

Explanation

Correct Answer

C:

The service stays within response-time targets under controlled load and suspicious request bursts are throttled. The observable result demonstrates that the documented condition, A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. has been addressed. The planned remediation is: Apply application-layer rate limits, caching and upstream traffic protections while investigating the request pattern. This is a stronger validation than a saved ticket or unverified claim by Juniper Media.

Incorrect Answers

A:

External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced. That observation would verify another scenario: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The corrective step for that other scenario is: Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections. But Juniper Media is evaluating: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The necessary outcome is: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

B:

Legitimate connections complete under controlled stress and half-open connection state stays within safe limits. That observation would verify another scenario: A TCP service sees many incomplete handshakes and the support team raises process limits without examining SYN-state exhaustion. The corrective step for that other scenario is: Use supported SYN-flood protections, connection-state monitoring and upstream filtering after validating the pattern. But Juniper Media is evaluating: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The necessary outcome is: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

D:

Legitimate high-volume requests remain serviceable while a synthetic abusive load is contained. That observation would verify another scenario: An application firewall starts blocking all customers during a minor burst because its threshold was copied from a development environment. The corrective step for that other scenario is: Tune mitigation thresholds from production baselines, enforce bounded challenges and provide controlled rollback. But Juniper Media is evaluating: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The necessary outcome is: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

Question 383

At Meadowbrook Finance, the banking cyber assurance team is conducting a controlled financial-services security review under requirements for auditability and transaction integrity. The authorized review identifies: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. Which action BEST addresses the documented security gap?

  1. Enforce input complexity, request budgets and backpressure at the expensive application endpoint.
  2. Apply application-layer rate limits, caching and upstream traffic protections while investigating the request pattern.
  3. Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage.
  4. Use supported SYN-flood protections, connection-state monitoring and upstream filtering after validating the pattern.

Explanation

Correct Answer

B:

Apply application-layer rate limits, caching and upstream traffic protections while investigating the request pattern. This directly addresses the authorized assessment finding: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The Meadowbrook Finance team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

Incorrect Answers

A:

Enforce input complexity, request budgets and backpressure at the expensive application endpoint. This is an appropriate control for a different issue: A load balancer handles HTTP floods but the internal API still crashes because a costly endpoint lacks request-level resource budgets. The Meadowbrook Finance finding instead concerns: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. It does not demonstrate the required correction. The decisive test remains: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

C:

Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage. This is an appropriate control for a different issue: A network operator activates a broad blackhole for an entire datacenter prefix after one endpoint is targeted by high traffic. The Meadowbrook Finance finding instead concerns: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. It does not demonstrate the required correction. The decisive test remains: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

D:

Use supported SYN-flood protections, connection-state monitoring and upstream filtering after validating the pattern. This is an appropriate control for a different issue: A TCP service sees many incomplete handshakes and the support team raises process limits without examining SYN-state exhaustion. The Meadowbrook Finance finding instead concerns: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. It does not demonstrate the required correction. The decisive test remains: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

Question 384

At Meadowbrook Finance, the banking cyber assurance team is conducting a controlled financial-services security review under requirements for auditability and transaction integrity. Following the approved correction, auditors require proof that: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. Which result BEST demonstrates successful remediation?

  1. The service stays within response-time targets under controlled load and suspicious request bursts are throttled.
  2. A provider-assisted tabletop demonstrates diversion of malicious load before the organization's access circuit saturates.
  3. The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.
  4. Legitimate high-volume requests remain serviceable while a synthetic abusive load is contained.

Explanation

Correct Answer

A:

The service stays within response-time targets under controlled load and suspicious request bursts are throttled. The observable result demonstrates that the documented condition, A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. has been addressed. The planned remediation is: Apply application-layer rate limits, caching and upstream traffic protections while investigating the request pattern. This is a stronger validation than a saved ticket or unverified claim by Meadowbrook Finance.

Incorrect Answers

B:

A provider-assisted tabletop demonstrates diversion of malicious load before the organization's access circuit saturates. That observation would verify another scenario: An incident response plan relies solely on a local firewall even though a volumetric flood saturates the internet circuit before reaching it. The corrective step for that other scenario is: Arrange upstream DDoS mitigation, protected routing and an escalation agreement with network providers. But Meadowbrook Finance is evaluating: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The necessary outcome is: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

C:

The incident classification differentiates approved customer demand from abusive behavior using documented telemetry. That observation would verify another scenario: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The corrective step for that other scenario is: Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event. But Meadowbrook Finance is evaluating: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The necessary outcome is: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

D:

Legitimate high-volume requests remain serviceable while a synthetic abusive load is contained. That observation would verify another scenario: An application firewall starts blocking all customers during a minor burst because its threshold was copied from a development environment. The corrective step for that other scenario is: Tune mitigation thresholds from production baselines, enforce bounded challenges and provide controlled rollback. But Meadowbrook Finance is evaluating: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The necessary outcome is: The service stays within response-time targets under controlled load and suspicious request bursts are throttled.

Question 385

At Eastshore Energy, the energy risk engineering team is conducting an authorized field-security exercise under requirements for remote equipment availability. Assessors report the following documented condition: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. Which action BEST addresses the documented security gap?

  1. Preserve timestamped edge metrics, error logs and service-level indicators for retrospective validation.
  2. Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections.
  3. Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event.
  4. Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage.

Explanation

Correct Answer

C:

Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event. This directly addresses the authorized assessment finding: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The Eastshore Energy team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

Incorrect Answers

A:

Preserve timestamped edge metrics, error logs and service-level indicators for retrospective validation. This is an appropriate control for a different issue: A post-incident report concludes that no DoS event occurred because all systems recovered before the investigator arrived. The Eastshore Energy finding instead concerns: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. It does not demonstrate the required correction. The decisive test remains: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

B:

Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections. This is an appropriate control for a different issue: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The Eastshore Energy finding instead concerns: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. It does not demonstrate the required correction. The decisive test remains: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

D:

Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage. This is an appropriate control for a different issue: A network operator activates a broad blackhole for an entire datacenter prefix after one endpoint is targeted by high traffic. The Eastshore Energy finding instead concerns: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. It does not demonstrate the required correction. The decisive test remains: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

Question 386

At Eastshore Energy, the energy risk engineering team is conducting an authorized field-security exercise under requirements for remote equipment availability. The team now needs objective retest evidence for: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. Which result BEST demonstrates successful remediation?

  1. External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.
  2. A synthetic burst does not exhaust backend resources and ordinary API requests retain acceptable latency.
  3. Legitimate connections complete under controlled stress and half-open connection state stays within safe limits.
  4. The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

Explanation

Correct Answer

D:

The incident classification differentiates approved customer demand from abusive behavior using documented telemetry. The observable result demonstrates that the documented condition, An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. has been addressed. The planned remediation is: Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event. This is a stronger validation than a saved ticket or unverified claim by Eastshore Energy.

Incorrect Answers

A:

External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced. That observation would verify another scenario: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The corrective step for that other scenario is: Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections. But Eastshore Energy is evaluating: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The necessary outcome is: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

B:

A synthetic burst does not exhaust backend resources and ordinary API requests retain acceptable latency. That observation would verify another scenario: A load balancer handles HTTP floods but the internal API still crashes because a costly endpoint lacks request-level resource budgets. The corrective step for that other scenario is: Enforce input complexity, request budgets and backpressure at the expensive application endpoint. But Eastshore Energy is evaluating: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The necessary outcome is: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

C:

Legitimate connections complete under controlled stress and half-open connection state stays within safe limits. That observation would verify another scenario: A TCP service sees many incomplete handshakes and the support team raises process limits without examining SYN-state exhaustion. The corrective step for that other scenario is: Use supported SYN-flood protections, connection-state monitoring and upstream filtering after validating the pattern. But Eastshore Energy is evaluating: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The necessary outcome is: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

Question 387

At Alpine Healthcare, the clinical technology defense team is conducting an authorized hospital risk exercise under requirements for patient safety and minimized disruption. The control assessment finds: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. Which action BEST addresses the documented security gap?

  1. Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event.
  2. Preserve timestamped edge metrics, error logs and service-level indicators for retrospective validation.
  3. Tune mitigation thresholds from production baselines, enforce bounded challenges and provide controlled rollback.
  4. Use supported SYN-flood protections, connection-state monitoring and upstream filtering after validating the pattern.

Explanation

Correct Answer

A:

Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event. This directly addresses the authorized assessment finding: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The Alpine Healthcare team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

Incorrect Answers

B:

Preserve timestamped edge metrics, error logs and service-level indicators for retrospective validation. This is an appropriate control for a different issue: A post-incident report concludes that no DoS event occurred because all systems recovered before the investigator arrived. The Alpine Healthcare finding instead concerns: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. It does not demonstrate the required correction. The decisive test remains: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

C:

Tune mitigation thresholds from production baselines, enforce bounded challenges and provide controlled rollback. This is an appropriate control for a different issue: An application firewall starts blocking all customers during a minor burst because its threshold was copied from a development environment. The Alpine Healthcare finding instead concerns: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. It does not demonstrate the required correction. The decisive test remains: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

D:

Use supported SYN-flood protections, connection-state monitoring and upstream filtering after validating the pattern. This is an appropriate control for a different issue: A TCP service sees many incomplete handshakes and the support team raises process limits without examining SYN-state exhaustion. The Alpine Healthcare finding instead concerns: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. It does not demonstrate the required correction. The decisive test remains: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

Question 388

At Alpine Healthcare, the clinical technology defense team is conducting an authorized hospital risk exercise under requirements for patient safety and minimized disruption. An independent validation is requested for the original problem: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. Which result BEST demonstrates successful remediation?

  1. Legitimate high-volume requests remain serviceable while a synthetic abusive load is contained.
  2. The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.
  3. The service stays within response-time targets under controlled load and suspicious request bursts are throttled.
  4. A provider-assisted tabletop demonstrates diversion of malicious load before the organization's access circuit saturates.

Explanation

Correct Answer

B:

The incident classification differentiates approved customer demand from abusive behavior using documented telemetry. The observable result demonstrates that the documented condition, An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. has been addressed. The planned remediation is: Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event. This is a stronger validation than a saved ticket or unverified claim by Alpine Healthcare.

Incorrect Answers

A:

Legitimate high-volume requests remain serviceable while a synthetic abusive load is contained. That observation would verify another scenario: An application firewall starts blocking all customers during a minor burst because its threshold was copied from a development environment. The corrective step for that other scenario is: Tune mitigation thresholds from production baselines, enforce bounded challenges and provide controlled rollback. But Alpine Healthcare is evaluating: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The necessary outcome is: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

C:

The service stays within response-time targets under controlled load and suspicious request bursts are throttled. That observation would verify another scenario: A public web service experiences a surge of requests that saturate the application worker pool while upstream bandwidth remains available. The corrective step for that other scenario is: Apply application-layer rate limits, caching and upstream traffic protections while investigating the request pattern. But Alpine Healthcare is evaluating: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The necessary outcome is: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

D:

A provider-assisted tabletop demonstrates diversion of malicious load before the organization's access circuit saturates. That observation would verify another scenario: An incident response plan relies solely on a local firewall even though a volumetric flood saturates the internet circuit before reaching it. The corrective step for that other scenario is: Arrange upstream DDoS mitigation, protected routing and an escalation agreement with network providers. But Alpine Healthcare is evaluating: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The necessary outcome is: The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.

Question 389

At Brookside Manufacturing, the industrial security team is conducting a plant safety and IT security assessment under requirements for production continuity and controlled test windows. The authorized review identifies: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. Which action BEST addresses the documented security gap?

  1. Arrange upstream DDoS mitigation, protected routing and an escalation agreement with network providers.
  2. Enforce input complexity, request budgets and backpressure at the expensive application endpoint.
  3. Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections.
  4. Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage.

Explanation

Correct Answer

C:

Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections. This directly addresses the authorized assessment finding: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The Brookside Manufacturing team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.

Incorrect Answers

A:

Arrange upstream DDoS mitigation, protected routing and an escalation agreement with network providers. This is an appropriate control for a different issue: An incident response plan relies solely on a local firewall even though a volumetric flood saturates the internet circuit before reaching it. The Brookside Manufacturing finding instead concerns: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. It does not demonstrate the required correction. The decisive test remains: External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.

B:

Enforce input complexity, request budgets and backpressure at the expensive application endpoint. This is an appropriate control for a different issue: A load balancer handles HTTP floods but the internal API still crashes because a costly endpoint lacks request-level resource budgets. The Brookside Manufacturing finding instead concerns: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. It does not demonstrate the required correction. The decisive test remains: External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.

D:

Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage. This is an appropriate control for a different issue: A network operator activates a broad blackhole for an entire datacenter prefix after one endpoint is targeted by high traffic. The Brookside Manufacturing finding instead concerns: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. It does not demonstrate the required correction. The decisive test remains: External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.

Question 390

At Brookside Manufacturing, the industrial security team is conducting a plant safety and IT security assessment under requirements for production continuity and controlled test windows. Following the approved correction, auditors require proof that: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. Which result BEST demonstrates successful remediation?

  1. The threatened application is protected while unrelated applications in the same prefix retain availability.
  2. External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.
  3. The incident classification differentiates approved customer demand from abusive behavior using documented telemetry.
  4. A provider-assisted tabletop demonstrates diversion of malicious load before the organization's access circuit saturates.

Explanation

Correct Answer

B:

External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced. The observable result demonstrates that the documented condition, A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. has been addressed. The planned remediation is: Restrict recursion to authorized clients and apply network anti-spoofing and response-rate protections. This is a stronger validation than a saved ticket or unverified claim by Brookside Manufacturing.

Incorrect Answers

A:

The threatened application is protected while unrelated applications in the same prefix retain availability. That observation would verify another scenario: A network operator activates a broad blackhole for an entire datacenter prefix after one endpoint is targeted by high traffic. The corrective step for that other scenario is: Use scoped upstream filtering or scrubbing appropriate to the affected service instead of indiscriminate prefix-wide outage. But Brookside Manufacturing is evaluating: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The necessary outcome is: External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.

C:

The incident classification differentiates approved customer demand from abusive behavior using documented telemetry. That observation would verify another scenario: An operations team interprets a large traffic graph as proof of a distributed denial-of-service attack without checking legitimate campaign activity. The corrective step for that other scenario is: Correlate traffic sources, protocol error rates, business demand and service impact before classifying the event. But Brookside Manufacturing is evaluating: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The necessary outcome is: External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.

D:

A provider-assisted tabletop demonstrates diversion of malicious load before the organization's access circuit saturates. That observation would verify another scenario: An incident response plan relies solely on a local firewall even though a volumetric flood saturates the internet circuit before reaching it. The corrective step for that other scenario is: Arrange upstream DDoS mitigation, protected routing and an escalation agreement with network providers. But Brookside Manufacturing is evaluating: A DNS resolver is exposed as an open recursive service and its egress spikes during an incident involving spoofed queries. The necessary outcome is: External unauthenticated clients cannot obtain recursive answers and abnormal amplification-related egress is reduced.