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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 10

Question 90

At Timberline Foods, the supply-chain assurance team is conducting a coordinated processing-plant assessment under requirements for food safety and secure logistics. Following the approved correction, auditors require proof that: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. Which result BEST demonstrates successful remediation?

  1. The token can no longer authenticate, historical access is assessed, and automated secret scanning blocks recurrence.
  2. The asset list separates past DNS observations from current confirmed addresses and ownership.
  3. Anonymous requests cannot retrieve the staging content and the index no longer points to accessible confidential screenshots.
  4. Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

Explanation

Correct Answer

D:

Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts. The observable result demonstrates that the documented condition, A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. has been addressed. The planned remediation is: Classify findings as passive, active, confirmed, or tentative and require traceable corroboration before escalation. This is a stronger validation than a saved ticket or unverified claim by Timberline Foods.

Incorrect Answers

A:

The token can no longer authenticate, historical access is assessed, and automated secret scanning blocks recurrence. That observation would verify another scenario: An organization's public repository includes a test configuration file with an apparently valid API token in its commit history. The corrective step for that other scenario is: Treat the token as potentially compromised, revoke it, examine access history, and remove exposure from supported repository history where possible. But Timberline Foods is evaluating: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. The necessary outcome is: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

B:

The asset list separates past DNS observations from current confirmed addresses and ownership. That observation would verify another scenario: A security review uses historical DNS records as proof that a host is currently online in the organization's network. The corrective step for that other scenario is: Treat passive DNS as historical context and independently verify current ownership and resolution through permitted checks. But Timberline Foods is evaluating: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. The necessary outcome is: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

C:

Anonymous requests cannot retrieve the staging content and the index no longer points to accessible confidential screenshots. That observation would verify another scenario: A company discovers its internal staging subdomain is indexed in public search results and displays debugging screenshots. The corrective step for that other scenario is: Remove the public exposure, apply access controls and search-index restrictions, and check whether secrets were already disclosed. But Timberline Foods is evaluating: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. The necessary outcome is: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

Question 91

At Silvercrest University, the campus cyber defense team is conducting an approved research-network assessment under requirements for governed research assets and minimal data collection. Assessors report the following documented condition: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. Which action BEST addresses the documented security gap?

  1. Review public recruiting content for infrastructure disclosures and use a role-relevant generic description instead.
  2. Classify findings as passive, active, confirmed, or tentative and require traceable corroboration before escalation.
  3. Verify domain ownership, permissible scope, and an explicit written extension before contacting similarly named external systems.
  4. Treat passive DNS as historical context and independently verify current ownership and resolution through permitted checks.

Explanation

Correct Answer

B:

Classify findings as passive, active, confirmed, or tentative and require traceable corroboration before escalation. This directly addresses the authorized assessment finding: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. The Silvercrest University team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

Incorrect Answers

A:

Review public recruiting content for infrastructure disclosures and use a role-relevant generic description instead. This is an appropriate control for a different issue: A phishing-awareness baseline includes a public job posting that reveals the exact VPN product and obsolete software release used by staff. The Silvercrest University finding instead concerns: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. It does not demonstrate the required correction. The decisive test remains: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

C:

Verify domain ownership, permissible scope, and an explicit written extension before contacting similarly named external systems. This is an appropriate control for a different issue: A reconnaissance team intends to use an unrelated domain with a similar name as a test target because it appears in search results. The Silvercrest University finding instead concerns: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. It does not demonstrate the required correction. The decisive test remains: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

D:

Treat passive DNS as historical context and independently verify current ownership and resolution through permitted checks. This is an appropriate control for a different issue: A security review uses historical DNS records as proof that a host is currently online in the organization's network. The Silvercrest University finding instead concerns: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. It does not demonstrate the required correction. The decisive test remains: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

Question 92

At Silvercrest University, the campus cyber defense team is conducting an approved research-network assessment under requirements for governed research assets and minimal data collection. The team now needs objective retest evidence for: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. Which result BEST demonstrates successful remediation?

  1. Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.
  2. The token can no longer authenticate, historical access is assessed, and automated secret scanning blocks recurrence.
  3. The inventory labels expired or orphaned names appropriately and reports only validated, in-scope active systems.
  4. The final asset record has confirmed operator, service owner, and current control contact rather than a guessed owner.

Explanation

Correct Answer

A:

Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts. The observable result demonstrates that the documented condition, A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. has been addressed. The planned remediation is: Classify findings as passive, active, confirmed, or tentative and require traceable corroboration before escalation. This is a stronger validation than a saved ticket or unverified claim by Silvercrest University.

Incorrect Answers

B:

The token can no longer authenticate, historical access is assessed, and automated secret scanning blocks recurrence. That observation would verify another scenario: An organization's public repository includes a test configuration file with an apparently valid API token in its commit history. The corrective step for that other scenario is: Treat the token as potentially compromised, revoke it, examine access history, and remove exposure from supported repository history where possible. But Silvercrest University is evaluating: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. The necessary outcome is: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

C:

The inventory labels expired or orphaned names appropriately and reports only validated, in-scope active systems. That observation would verify another scenario: A web assessment reports a certificate-transparency entry as a live, vulnerable application without validating the corresponding service. The corrective step for that other scenario is: Use certificate-transparency findings to identify candidate names and verify live scope and service availability separately. But Silvercrest University is evaluating: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. The necessary outcome is: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

D:

The final asset record has confirmed operator, service owner, and current control contact rather than a guessed owner. That observation would verify another scenario: A supplier's contact details appear in a third-party WHOIS cache and the assessor assumes that the supplier runs the target service. The corrective step for that other scenario is: Correlate domain registration evidence with verified DNS and asset ownership instead of equating a registrant field with service operation. But Silvercrest University is evaluating: A domain footprinting report contains only a list of discovered addresses and no explanation of their source reliability. The necessary outcome is: Each asset record exposes its provenance, last observation, and confidence, and unsupported guesses are not treated as verified facts.

Question 93

At Meadowbrook Finance, the banking cyber assurance team is conducting a controlled financial-services security review under requirements for auditability and transaction integrity. The control assessment finds: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. Which action BEST addresses the documented security gap?

  1. Cross-check permitted TCP or service responses and local inventory before concluding the system is offline.
  2. Verify device identity through inventory and approved service evidence instead of trusting reverse DNS alone.
  3. Use approved scanning intensity, maintenance windows, device-owner consent, and passive alternatives for fragile equipment.
  4. Validate vulnerability applicability against patch evidence and safe service checks rather than treating banners as conclusive proof.

Explanation

Correct Answer

A:

Cross-check permitted TCP or service responses and local inventory before concluding the system is offline. This directly addresses the authorized assessment finding: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The Meadowbrook Finance team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

Incorrect Answers

B:

Verify device identity through inventory and approved service evidence instead of trusting reverse DNS alone. This is an appropriate control for a different issue: A scanner discovers a device address but its reverse DNS label points to a decommissioned server name. The Meadowbrook Finance finding instead concerns: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. It does not demonstrate the required correction. The decisive test remains: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

C:

Use approved scanning intensity, maintenance windows, device-owner consent, and passive alternatives for fragile equipment. This is an appropriate control for a different issue: A change team schedules full-port scans across hospital equipment during patient-care hours without a risk review. The Meadowbrook Finance finding instead concerns: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. It does not demonstrate the required correction. The decisive test remains: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

D:

Validate vulnerability applicability against patch evidence and safe service checks rather than treating banners as conclusive proof. This is an appropriate control for a different issue: A banner suggests a web server version with a known weakness, but the vendor has backported a security fix without changing its version string. The Meadowbrook Finance finding instead concerns: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. It does not demonstrate the required correction. The decisive test remains: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

Question 94

At Meadowbrook Finance, the banking cyber assurance team is conducting a controlled financial-services security review under requirements for auditability and transaction integrity. An independent validation is requested for the original problem: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. Which result BEST demonstrates successful remediation?

  1. The platform finding cites independent compatible signals or is explicitly reported as low-confidence.
  2. A repeated scan from the same approved vantage reproduces the state change or explains it as path-dependent filtering.
  3. The test log shows no unapproved traffic to sensitive devices and their availability remains stable during observation.
  4. The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

Explanation

Correct Answer

D:

The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered. The observable result demonstrates that the documented condition, An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. has been addressed. The planned remediation is: Cross-check permitted TCP or service responses and local inventory before concluding the system is offline. This is a stronger validation than a saved ticket or unverified claim by Meadowbrook Finance.

Incorrect Answers

A:

The platform finding cites independent compatible signals or is explicitly reported as low-confidence. That observation would verify another scenario: A report infers an operating system from one open-port banner even though the same service runs on multiple platforms. The corrective step for that other scenario is: Use multiple allowed observations and identify uncertainty in OS fingerprinting conclusions. But Meadowbrook Finance is evaluating: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The necessary outcome is: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

B:

A repeated scan from the same approved vantage reproduces the state change or explains it as path-dependent filtering. That observation would verify another scenario: An assessment compares two scans with different source networks and incorrectly concludes that a firewall rule changed. The corrective step for that other scenario is: Control scan vantage point, timing, authentication, and network path before interpreting differences. But Meadowbrook Finance is evaluating: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The necessary outcome is: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

C:

The test log shows no unapproved traffic to sensitive devices and their availability remains stable during observation. That observation would verify another scenario: A change team schedules full-port scans across hospital equipment during patient-care hours without a risk review. The corrective step for that other scenario is: Use approved scanning intensity, maintenance windows, device-owner consent, and passive alternatives for fragile equipment. But Meadowbrook Finance is evaluating: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The necessary outcome is: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

Question 95

At Harborline Logistics, the warehouse security team is conducting a contracted distribution-system assessment under requirements for scanner uptime and controlled supplier access. The authorized review identifies: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. Which action BEST addresses the documented security gap?

  1. Reconcile translated addresses to the authoritative server inventory and align scan windows before counting asset changes.
  2. Cross-check permitted TCP or service responses and local inventory before concluding the system is offline.
  3. Control scan vantage point, timing, authentication, and network path before interpreting differences.
  4. Use multiple allowed observations and identify uncertainty in OS fingerprinting conclusions.

Explanation

Correct Answer

B:

Cross-check permitted TCP or service responses and local inventory before concluding the system is offline. This directly addresses the authorized assessment finding: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The Harborline Logistics team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

Incorrect Answers

A:

Reconcile translated addresses to the authoritative server inventory and align scan windows before counting asset changes. This is an appropriate control for a different issue: An engineer compares scan results generated before and after a NAT migration without preserving the mapping to actual server IDs. The Harborline Logistics finding instead concerns: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. It does not demonstrate the required correction. The decisive test remains: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

C:

Control scan vantage point, timing, authentication, and network path before interpreting differences. This is an appropriate control for a different issue: An assessment compares two scans with different source networks and incorrectly concludes that a firewall rule changed. The Harborline Logistics finding instead concerns: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. It does not demonstrate the required correction. The decisive test remains: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

D:

Use multiple allowed observations and identify uncertainty in OS fingerprinting conclusions. This is an appropriate control for a different issue: A report infers an operating system from one open-port banner even though the same service runs on multiple platforms. The Harborline Logistics finding instead concerns: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. It does not demonstrate the required correction. The decisive test remains: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

Question 96

At Harborline Logistics, the warehouse security team is conducting a contracted distribution-system assessment under requirements for scanner uptime and controlled supplier access. Following the approved correction, auditors require proof that: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. Which result BEST demonstrates successful remediation?

  1. The same backend servers are identified correctly across both address plans without phantom additions or omissions.
  2. Recorded scan targets are a subset of explicitly permitted addresses and the excluded network receives no scan probes.
  3. The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.
  4. The finding differentiates apparent product versions from confirmed vulnerable builds and documents the verification method.

Explanation

Correct Answer

C:

The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered. The observable result demonstrates that the documented condition, An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. has been addressed. The planned remediation is: Cross-check permitted TCP or service responses and local inventory before concluding the system is offline. This is a stronger validation than a saved ticket or unverified claim by Harborline Logistics.

Incorrect Answers

A:

The same backend servers are identified correctly across both address plans without phantom additions or omissions. That observation would verify another scenario: An engineer compares scan results generated before and after a NAT migration without preserving the mapping to actual server IDs. The corrective step for that other scenario is: Reconcile translated addresses to the authoritative server inventory and align scan windows before counting asset changes. But Harborline Logistics is evaluating: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The necessary outcome is: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

B:

Recorded scan targets are a subset of explicitly permitted addresses and the excluded network receives no scan probes. That observation would verify another scenario: A scanner's target list mixes production and test subnets because it expands a broad CIDR beyond the written scope. The corrective step for that other scenario is: Constrain exact host ranges and network exclusions before execution and enforce safety limits in the scanning profile. But Harborline Logistics is evaluating: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The necessary outcome is: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

D:

The finding differentiates apparent product versions from confirmed vulnerable builds and documents the verification method. That observation would verify another scenario: A banner suggests a web server version with a known weakness, but the vendor has backported a security fix without changing its version string. The corrective step for that other scenario is: Validate vulnerability applicability against patch evidence and safe service checks rather than treating banners as conclusive proof. But Harborline Logistics is evaluating: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The necessary outcome is: The assessment records the host as reachable through an allowed protocol while accurately noting that ICMP is filtered.

Question 97

At Alpine Healthcare, the clinical technology defense team is conducting an authorized hospital risk exercise under requirements for patient safety and minimized disruption. Assessors report the following documented condition: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. Which action BEST addresses the documented security gap?

  1. Constrain exact host ranges and network exclusions before execution and enforce safety limits in the scanning profile.
  2. Validate vulnerability applicability against patch evidence and safe service checks rather than treating banners as conclusive proof.
  3. Cross-check permitted TCP or service responses and local inventory before concluding the system is offline.
  4. Distinguish closed-port responses from silently filtered traffic and document the transport evidence used for classification.

Explanation

Correct Answer

D:

Distinguish closed-port responses from silently filtered traffic and document the transport evidence used for classification. This directly addresses the authorized assessment finding: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The Alpine Healthcare team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

Incorrect Answers

A:

Constrain exact host ranges and network exclusions before execution and enforce safety limits in the scanning profile. This is an appropriate control for a different issue: A scanner's target list mixes production and test subnets because it expands a broad CIDR beyond the written scope. The Alpine Healthcare finding instead concerns: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. It does not demonstrate the required correction. The decisive test remains: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

B:

Validate vulnerability applicability against patch evidence and safe service checks rather than treating banners as conclusive proof. This is an appropriate control for a different issue: A banner suggests a web server version with a known weakness, but the vendor has backported a security fix without changing its version string. The Alpine Healthcare finding instead concerns: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. It does not demonstrate the required correction. The decisive test remains: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

C:

Cross-check permitted TCP or service responses and local inventory before concluding the system is offline. This is an appropriate control for a different issue: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The Alpine Healthcare finding instead concerns: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. It does not demonstrate the required correction. The decisive test remains: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

Question 98

At Alpine Healthcare, the clinical technology defense team is conducting an authorized hospital risk exercise under requirements for patient safety and minimized disruption. The team now needs objective retest evidence for: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. Which result BEST demonstrates successful remediation?

  1. Firewall connection counts and branch service latency remain within the defined safety envelope during the rerun.
  2. The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.
  3. The platform finding cites independent compatible signals or is explicitly reported as low-confidence.
  4. Recorded scan targets are a subset of explicitly permitted addresses and the excluded network receives no scan probes.

Explanation

Correct Answer

B:

The report labels the port state consistently with the observed TCP response and identifies any network filtering separately. The observable result demonstrates that the documented condition, A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. has been addressed. The planned remediation is: Distinguish closed-port responses from silently filtered traffic and document the transport evidence used for classification. This is a stronger validation than a saved ticket or unverified claim by Alpine Healthcare.

Incorrect Answers

A:

Firewall connection counts and branch service latency remain within the defined safety envelope during the rerun. That observation would verify another scenario: A scheduled scanner unexpectedly overwhelms a branch firewall because many scan workers share one egress address. The corrective step for that other scenario is: Rate-limit concurrent connections and coordinate with network owners to keep the authorized assessment within agreed thresholds. But Alpine Healthcare is evaluating: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The necessary outcome is: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

C:

The platform finding cites independent compatible signals or is explicitly reported as low-confidence. That observation would verify another scenario: A report infers an operating system from one open-port banner even though the same service runs on multiple platforms. The corrective step for that other scenario is: Use multiple allowed observations and identify uncertainty in OS fingerprinting conclusions. But Alpine Healthcare is evaluating: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The necessary outcome is: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

D:

Recorded scan targets are a subset of explicitly permitted addresses and the excluded network receives no scan probes. That observation would verify another scenario: A scanner's target list mixes production and test subnets because it expands a broad CIDR beyond the written scope. The corrective step for that other scenario is: Constrain exact host ranges and network exclusions before execution and enforce safety limits in the scanning profile. But Alpine Healthcare is evaluating: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The necessary outcome is: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

Question 99

At Timberline Foods, the supply-chain assurance team is conducting a coordinated processing-plant assessment under requirements for food safety and secure logistics. The control assessment finds: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. Which action BEST addresses the documented security gap?

  1. Cross-check permitted TCP or service responses and local inventory before concluding the system is offline.
  2. Reconcile translated addresses to the authoritative server inventory and align scan windows before counting asset changes.
  3. Distinguish closed-port responses from silently filtered traffic and document the transport evidence used for classification.
  4. Control scan vantage point, timing, authentication, and network path before interpreting differences.

Explanation

Correct Answer

C:

Distinguish closed-port responses from silently filtered traffic and document the transport evidence used for classification. This directly addresses the authorized assessment finding: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The Timberline Foods team should verify the outcome rather than treat a configuration edit as proof. Acceptance evidence: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

Incorrect Answers

A:

Cross-check permitted TCP or service responses and local inventory before concluding the system is offline. This is an appropriate control for a different issue: An authorized discovery scan marks a host as down solely because it ignores ICMP echo requests. The Timberline Foods finding instead concerns: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. It does not demonstrate the required correction. The decisive test remains: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

B:

Reconcile translated addresses to the authoritative server inventory and align scan windows before counting asset changes. This is an appropriate control for a different issue: An engineer compares scan results generated before and after a NAT migration without preserving the mapping to actual server IDs. The Timberline Foods finding instead concerns: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. It does not demonstrate the required correction. The decisive test remains: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

D:

Control scan vantage point, timing, authentication, and network path before interpreting differences. This is an appropriate control for a different issue: An assessment compares two scans with different source networks and incorrectly concludes that a firewall rule changed. The Timberline Foods finding instead concerns: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. It does not demonstrate the required correction. The decisive test remains: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

Question 100

At Timberline Foods, the supply-chain assurance team is conducting a coordinated processing-plant assessment under requirements for food safety and secure logistics. An independent validation is requested for the original problem: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. Which result BEST demonstrates successful remediation?

  1. The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.
  2. A repeated scan from the same approved vantage reproduces the state change or explains it as path-dependent filtering.
  3. The same backend servers are identified correctly across both address plans without phantom additions or omissions.
  4. Recorded scan targets are a subset of explicitly permitted addresses and the excluded network receives no scan probes.

Explanation

Correct Answer

A:

The report labels the port state consistently with the observed TCP response and identifies any network filtering separately. The observable result demonstrates that the documented condition, A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. has been addressed. The planned remediation is: Distinguish closed-port responses from silently filtered traffic and document the transport evidence used for classification. This is a stronger validation than a saved ticket or unverified claim by Timberline Foods.

Incorrect Answers

B:

A repeated scan from the same approved vantage reproduces the state change or explains it as path-dependent filtering. That observation would verify another scenario: An assessment compares two scans with different source networks and incorrectly concludes that a firewall rule changed. The corrective step for that other scenario is: Control scan vantage point, timing, authentication, and network path before interpreting differences. But Timberline Foods is evaluating: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The necessary outcome is: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

C:

The same backend servers are identified correctly across both address plans without phantom additions or omissions. That observation would verify another scenario: An engineer compares scan results generated before and after a NAT migration without preserving the mapping to actual server IDs. The corrective step for that other scenario is: Reconcile translated addresses to the authoritative server inventory and align scan windows before counting asset changes. But Timberline Foods is evaluating: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The necessary outcome is: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.

D:

Recorded scan targets are a subset of explicitly permitted addresses and the excluded network receives no scan probes. That observation would verify another scenario: A scanner's target list mixes production and test subnets because it expands a broad CIDR beyond the written scope. The corrective step for that other scenario is: Constrain exact host ranges and network exclusions before execution and enforce safety limits in the scanning profile. But Timberline Foods is evaluating: A scanner labels a closed TCP port as filtered even though the target actively returns a refusal response. The necessary outcome is: The report labels the port state consistently with the observed TCP response and identifies any network filtering separately.