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Exam Code: CISSP
Exam Name: Certified Information Systems Security Professional
Certification Provider: ISC
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Certified Information Systems Security Professional CISSP Practice Test 28

Question 270

A release team treats a passing unit test as production security readiness. After implementing a remedy, which acceptance-test evidence MOST directly demonstrates that the specific issue has been addressed?

  1. Inspect CI job status without checking preproduction security test evidence and approvals
  2. Compare preproduction evidence with documented acceptance rules
  3. Verify the web page loads in production while unauthorized access and secret handling remain untested
  4. Confirm functional unit tests pass without comparing the deployed build with security acceptance rules

Explanation

Correct Answer

B:

Verification and validation extend beyond developer-level tests. The result of the remedy is checked directly: Compare preproduction evidence with documented acceptance rules.

Incorrect Answers

A:

Verification and validation extend beyond developer-level tests. The proposed check, “Inspect CI job status without checking preproduction security test evidence and approvals”, misses the relevant outcome; “Compare preproduction evidence with documented acceptance rules” tests whether the intended remedy worked.

C:

Verification and validation extend beyond developer-level tests. The proposed check, “Verify the web page loads in production while unauthorized access and secret handling remain untested”, misses the relevant outcome; “Compare preproduction evidence with documented acceptance rules” tests whether the intended remedy worked.

D:

“Confirm functional unit tests pass without comparing the deployed build with security acceptance rules” does not show the required outcome: compare preproduction evidence with documented acceptance rules. That test matters because verification and validation extend beyond developer-level tests.

Question 271

A retired system still contains recoverable secrets in archived images. Which security recommendation MOST directly addresses the described risk or requirement?

  1. Remove user accounts but leave stored machine credentials in offline images and backups
  2. Delete the retired system's cloud inventory entry while leaving its image snapshots recoverable
  3. Plan secure retirement with retention, export and verified media disposal
  4. Retain all archived system images indefinitely without evaluating secrets, legal holds or safe disposal

Explanation

Correct Answer

C:

Decommissioning is a security lifecycle phase, not just power-off. A direct way to confirm the outcome is to review approved archive and sanitization records.

Incorrect Answers

A:

The security distinction is that decommissioning is a security lifecycle phase, not just power-off. “Remove user accounts but leave stored machine credentials in offline images and backups” addresses neither the required “Plan secure retirement with retention, export and verified media disposal” action nor its supporting evidence: “Review approved archive and sanitization records”.

B:

Decommissioning is a security lifecycle phase, not just power-off. “Delete the retired system's cloud inventory entry while leaving its image snapshots recoverable” does not supply that control; “Plan secure retirement with retention, export and verified media disposal” addresses the identified gap, and “Review approved archive and sanitization records” verifies the result.

D:

Decommissioning is a security lifecycle phase, not just power-off. “Retain all archived system images indefinitely without evaluating secrets, legal holds or safe disposal” does not supply that control; “Plan secure retirement with retention, export and verified media disposal” addresses the identified gap, and “Review approved archive and sanitization records” verifies the result.

Question 272

A retired system still contains recoverable secrets in archived images. After implementing a remedy, which acceptance-test evidence MOST directly demonstrates that the specific issue has been addressed?

  1. Confirm the system no longer serves traffic but not whether archives contain recoverable credentials
  2. Check deletion of the VM object without reviewing image retirement and sanitization records
  3. Verify contract termination while retained snapshots remain accessible to old administrators
  4. Review approved archive and sanitization records

Explanation

Correct Answer

D:

Decommissioning is a security lifecycle phase, not just power-off. The result of the remedy is checked directly: Review approved archive and sanitization records.

Incorrect Answers

A:

“Confirm the system no longer serves traffic but not whether archives contain recoverable credentials” evaluates something other than the specified fix. The meaningful evidence is “Review approved archive and sanitization records”, reflecting the requirement that decommissioning is a security lifecycle phase, not just power-off.

B:

“Check deletion of the VM object without reviewing image retirement and sanitization records” is insufficient to demonstrate that “Plan secure retirement with retention, export and verified media disposal” works. Decommissioning is a security lifecycle phase, not just power-off. The decisive test is “Review approved archive and sanitization records”.

C:

“Verify contract termination while retained snapshots remain accessible to old administrators” evaluates something other than the specified fix. The meaningful evidence is “Review approved archive and sanitization records”, reflecting the requirement that decommissioning is a security lifecycle phase, not just power-off.

Question 273

A cryptographic module reveals secret-dependent state when an attacker deliberately injects voltage faults. Which security recommendation MOST directly addresses the described risk or requirement?

  1. Implement fault-aware cryptographic error handling and tamper resistance
  2. Increase the AES key length but leave the crypto module's voltage-glitch detection and state handling unchanged
  3. Mask power-fault events in the operator log while returning sensitive intermediate state to callers
  4. Use a constant-time routine for normal inputs but allow injected faults to bypass critical verification steps

Explanation

Correct Answer

A:

Fault injection targets implementation integrity, not mathematical key length. A direct way to confirm the outcome is to controlled fault injection yields no secret-dependent output or successful bypass.

Incorrect Answers

B:

“Increase the AES key length but leave the crypto module's voltage-glitch detection and state handling unchanged” would not establish the protection described: fault injection targets implementation integrity, not mathematical key length. The necessary change is “Implement fault-aware cryptographic error handling and tamper resistance” with the verification “controlled fault injection yields no secret-dependent output or successful bypass”.

C:

“Mask power-fault events in the operator log while returning sensitive intermediate state to callers” leaves the essential control missing: fault injection targets implementation integrity, not mathematical key length. The direct corrective action is “Implement fault-aware cryptographic error handling and tamper resistance”, validated by the acceptance check “controlled fault injection yields no secret-dependent output or successful bypass”.

D:

“Use a constant-time routine for normal inputs but allow injected faults to bypass critical verification steps” would not establish the protection described: fault injection targets implementation integrity, not mathematical key length. The necessary change is “Implement fault-aware cryptographic error handling and tamper resistance” with the verification “controlled fault injection yields no secret-dependent output or successful bypass”.

Question 274

A branch sends administrator credentials through an unencrypted legacy remote terminal protocol. Which security recommendation MOST directly addresses the described risk or requirement?

  1. Change remote terminal passwords weekly without encrypting commands sent over the branch link
  2. Replace it with authenticated encrypted administrative access
  3. Hide terminal access behind a private DNS name while leaving credentials observable in transit
  4. Keep the legacy plaintext terminal session but limit its use to business hours

Explanation

Correct Answer

B:

Secure Shell protects remote management unlike plaintext terminal access. A direct way to confirm the outcome is to capture the session and confirm remote commands and credentials are protected.

Incorrect Answers

A:

Secure Shell protects remote management unlike plaintext terminal access. “Change remote terminal passwords weekly without encrypting commands sent over the branch link” does not supply that control; “Replace it with authenticated encrypted administrative access” addresses the identified gap, and “Capture the session and confirm remote commands and credentials are protected” verifies the result.

C:

Secure Shell protects remote management unlike plaintext terminal access. “Hide terminal access behind a private DNS name while leaving credentials observable in transit” does not supply that control; “Replace it with authenticated encrypted administrative access” addresses the identified gap, and “Capture the session and confirm remote commands and credentials are protected” verifies the result.

D:

The security distinction is that secure Shell protects remote management unlike plaintext terminal access. “Keep the legacy plaintext terminal session but limit its use to business hours” addresses neither the required “Replace it with authenticated encrypted administrative access” action nor its supporting evidence: “Capture the session and confirm remote commands and credentials are protected”.

Question 275

A branch sends administrator credentials through an unencrypted legacy remote terminal protocol. After implementing a remedy, which acceptance-test evidence MOST directly demonstrates that the specific issue has been addressed?

  1. Review credential complexity but never capture remote command traffic on the legacy protocol
  2. Confirm administrators can successfully log in without inspecting traffic for cleartext passwords
  3. Capture the session and confirm remote commands and credentials are protected
  4. Verify the branch firewall permits only approved IPs while the session payload remains unencrypted

Explanation

Correct Answer

C:

Secure Shell protects remote management unlike plaintext terminal access. The result of the remedy is checked directly: Capture the session and confirm remote commands and credentials are protected.

Incorrect Answers

A:

“Review credential complexity but never capture remote command traffic on the legacy protocol” is insufficient to demonstrate that “Replace it with authenticated encrypted administrative access” works. Secure Shell protects remote management unlike plaintext terminal access. The decisive test is “Capture the session and confirm remote commands and credentials are protected”.

B:

“Confirm administrators can successfully log in without inspecting traffic for cleartext passwords” evaluates something other than the specified fix. The meaningful evidence is “Capture the session and confirm remote commands and credentials are protected”, reflecting the requirement that secure Shell protects remote management unlike plaintext terminal access.

D:

“Verify the branch firewall permits only approved IPs while the session payload remains unencrypted” evaluates something other than the specified fix. The meaningful evidence is “Capture the session and confirm remote commands and credentials are protected”, reflecting the requirement that secure Shell protects remote management unlike plaintext terminal access.

Question 276

A remote workforce needs protected access to internal application networks. Which security recommendation MOST directly addresses the described risk or requirement?

  1. Grant every remote worker VPN access to all internal subnets without resource authorization
  2. Send applications over the public Internet and rely solely on passwords for network protection
  3. Deploy a VPN concentrator that accepts unregistered devices using a shared pre-shared key
  4. Use an authenticated VPN architecture with appropriate route and authorization policy

Explanation

Correct Answer

D:

Encrypted tunnels do not eliminate endpoint trust and authorization requirements. A direct way to confirm the outcome is to test traffic protection and rejection of an unapproved device.

Incorrect Answers

A:

“Grant every remote worker VPN access to all internal subnets without resource authorization” would not establish the protection described: encrypted tunnels do not eliminate endpoint trust and authorization requirements. The necessary change is “Use an authenticated VPN architecture with appropriate route and authorization policy” with the verification “Test traffic protection and rejection of an unapproved device”.

B:

“Send applications over the public Internet and rely solely on passwords for network protection” leaves the essential control missing: encrypted tunnels do not eliminate endpoint trust and authorization requirements. The direct corrective action is “Use an authenticated VPN architecture with appropriate route and authorization policy”, validated by the acceptance check “Test traffic protection and rejection of an unapproved device”.

C:

“Deploy a VPN concentrator that accepts unregistered devices using a shared pre-shared key” would not establish the protection described: encrypted tunnels do not eliminate endpoint trust and authorization requirements. The necessary change is “Use an authenticated VPN architecture with appropriate route and authorization policy” with the verification “Test traffic protection and rejection of an unapproved device”.

Question 277

A remote workforce needs protected access to internal application networks. After implementing a remedy, which acceptance-test evidence MOST directly demonstrates that the specific issue has been addressed?

  1. Test traffic protection and rejection of an unapproved device
  2. Review the VPN client installation count without capturing a protected user session
  3. Verify tunnel uptime while unrestricted network routes permit access beyond job roles
  4. Confirm a registered device connects but never try an unapproved endpoint

Explanation

Correct Answer

A:

Encrypted tunnels do not eliminate endpoint trust and authorization requirements. The result of the remedy is checked directly: Test traffic protection and rejection of an unapproved device.

Incorrect Answers

B:

An observation of “Review the VPN client installation count without capturing a protected user session” would not verify the relevant control. Encrypted tunnels do not eliminate endpoint trust and authorization requirements. The necessary acceptance evidence is “Test traffic protection and rejection of an unapproved device”.

C:

The acceptance test must demonstrate “Test traffic protection and rejection of an unapproved device” because encrypted tunnels do not eliminate endpoint trust and authorization requirements. “Verify tunnel uptime while unrestricted network routes permit access beyond job roles” cannot establish that result.

D:

An observation of “Confirm a registered device connects but never try an unapproved endpoint” would not verify the relevant control. Encrypted tunnels do not eliminate endpoint trust and authorization requirements. The necessary acceptance evidence is “Test traffic protection and rejection of an unapproved device”.

Question 278

A public API transmits personal information over an old SSL protocol. Which security recommendation MOST directly addresses the described risk or requirement?

  1. Allow users to dismiss SSL security warnings and proceed with personal-data transfers
  2. Require supported TLS versions and validated server certificates
  3. Continue accepting deprecated SSL because the public API requires backward compatibility
  4. Encrypt only the application payload while leaving certificate validation disabled on the channel

Explanation

Correct Answer

B:

TLS protocol hardening prevents fallback to obsolete cryptography. A direct way to confirm the outcome is to test negotiation failure for deprecated protocol versions.

Incorrect Answers

A:

“Allow users to dismiss SSL security warnings and proceed with personal-data transfers” is not the relevant mitigation. TLS protocol hardening prevents fallback to obsolete cryptography. The scenario calls for “Require supported TLS versions and validated server certificates”; the acceptance check is “Test negotiation failure for deprecated protocol versions”.

C:

“Continue accepting deprecated SSL because the public API requires backward compatibility” is not the relevant mitigation. TLS protocol hardening prevents fallback to obsolete cryptography. The scenario calls for “Require supported TLS versions and validated server certificates”; the acceptance check is “Test negotiation failure for deprecated protocol versions”.

D:

The proposal “Encrypt only the application payload while leaving certificate validation disabled on the channel” does not meet the relevant requirement because TLS protocol hardening prevents fallback to obsolete cryptography. The matching remediation is “Require supported TLS versions and validated server certificates”.

Question 279

A public API transmits personal information over an old SSL protocol. After implementing a remedy, which acceptance-test evidence MOST directly demonstrates that the specific issue has been addressed?

  1. Confirm a modern TLS client can connect without testing a deprecated-protocol handshake
  2. Inspect the server certificate date but not whether old SSL versions are rejected
  3. Test negotiation failure for deprecated protocol versions
  4. Verify the API returns data correctly while accepting a forged or unvalidated server certificate

Explanation

Correct Answer

C:

TLS protocol hardening prevents fallback to obsolete cryptography. The result of the remedy is checked directly: Test negotiation failure for deprecated protocol versions.

Incorrect Answers

A:

“Confirm a modern TLS client can connect without testing a deprecated-protocol handshake” does not show the required outcome: test negotiation failure for deprecated protocol versions. That test matters because TLS protocol hardening prevents fallback to obsolete cryptography.

B:

TLS protocol hardening prevents fallback to obsolete cryptography. The proposed check, “Inspect the server certificate date but not whether old SSL versions are rejected”, misses the relevant outcome; “Test negotiation failure for deprecated protocol versions” tests whether the intended remedy worked.

D:

TLS protocol hardening prevents fallback to obsolete cryptography. The proposed check, “Verify the API returns data correctly while accepting a forged or unvalidated server certificate”, misses the relevant outcome; “Test negotiation failure for deprecated protocol versions” tests whether the intended remedy worked.

Question 280

A voice system carries sensitive calls over a shared office data network. Which security recommendation MOST directly addresses the described risk or requirement?

  1. Encrypt call setup messages only while voice media traverses the shared LAN in cleartext
  2. Treat desk-phone physical location as sufficient proof that sensitive calls need no network controls
  3. Separate voice devices into a VLAN but leave call signaling and audio streams unprotected
  4. Separate voice trust boundaries and protect signaling and media appropriately

Explanation

Correct Answer

D:

Voice traffic needs confidentiality, integrity and availability considerations. A direct way to confirm the outcome is to capture call signaling and media and check protected treatment.

Incorrect Answers

A:

Voice traffic needs confidentiality, integrity and availability considerations. “Encrypt call setup messages only while voice media traverses the shared LAN in cleartext” does not supply that control; “Separate voice trust boundaries and protect signaling and media appropriately” addresses the identified gap, and “Capture call signaling and media and check protected treatment” verifies the result.

B:

The security distinction is that voice traffic needs confidentiality, integrity and availability considerations. “Treat desk-phone physical location as sufficient proof that sensitive calls need no network controls” addresses neither the required “Separate voice trust boundaries and protect signaling and media appropriately” action nor its supporting evidence: “Capture call signaling and media and check protected treatment”.

C:

Voice traffic needs confidentiality, integrity and availability considerations. “Separate voice devices into a VLAN but leave call signaling and audio streams unprotected” does not supply that control; “Separate voice trust boundaries and protect signaling and media appropriately” addresses the identified gap, and “Capture call signaling and media and check protected treatment” verifies the result.

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