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Certified Information Systems Security Professional CISSP Practice Test 28

Question 270

Management implemented a response after this event: A network service uses anycast to reach a nearby node, but session data is only stored on the previous node. The response was: Design state continuity and session recovery independently from anycast routing. Which observed outcome BEST verifies that the intended security protection operates, rather than merely appearing in a plan?

  1. Clients connect to the anycast IP after failure but their recently committed orders vanish.
  2. BGP convergence is fast, yet authenticated users must restart workflows with lost state.
  3. The nearest site responds to ping while the recovered service cannot reconstruct an active transaction.
  4. A failed site redirects new traffic and retained business state remains consistent.

Explanation

Correct Answer

D:

A failed site redirects new traffic and retained business state remains consistent. Routing multiple sites under one destination IP does not replicate application session state.

Incorrect Answers

A:

Reachability without state continuity does not meet the business recovery objective.

B:

A routing metric is not evidence of acceptable application failover.

C:

Layer 3 response does not demonstrate durable session or business data.

Question 271

A video conference has ample average bandwidth but audio quality deteriorates because packet delay varies wildly. As the accountable security practitioner, which response BEST addresses the specific weakness without introducing a different untested control?

  1. Upgrade encryption key length for video traffic without measuring variable packet delay.
  2. Increase average bandwidth on reports but ignore burst congestion, queueing and packet delay variance.
  3. Measure and control jitter, loss and latency with appropriate QoS and traffic engineering.
  4. Deploy more storage for video archives while real-time RTP packets arrive irregularly.

Explanation

Correct Answer

C:

Real-time communications depend on packet timing, not aggregate throughput alone. QoS cannot create missing physical capacity and should be validated under congestion.

Incorrect Answers

A:

Cryptographic strength does not address jitter in real-time media delivery.

B:

Capacity totals can mask latency variance that disrupts interactive audio.

D:

Archival capacity cannot improve packet timing in a live call.

Question 272

The organization implemented the response to this scenario: A video conference has ample average bandwidth but audio quality deteriorates because packet delay varies wildly. The approved response was: Measure and control jitter, loss and latency with appropriate QoS and traffic engineering. Which statement MOST accurately identifies a remaining risk or constraint?

  1. QoS cannot create missing physical capacity and should be validated under congestion.
  2. A large average bandwidth figure guarantees acceptable voice quality regardless of packet timing.
  3. QoS policies can create unlimited physical capacity on an already saturated link.
  4. Low packet loss automatically implies no audio distortion even if delay varies wildly.

Explanation

Correct Answer

A:

Real-time communications depend on packet timing, not aggregate throughput alone. A congestion test demonstrates bounded jitter and acceptable interactive call quality.

Incorrect Answers

B:

Jitter, loss and latency can harm audio despite ample throughput.

C:

Traffic prioritization cannot supply bandwidth absent from the transport.

D:

Real-time buffering and varying arrival times can degrade conversation quality.

Question 273

Management implemented a response after this event: A video conference has ample average bandwidth but audio quality deteriorates because packet delay varies wildly. The response was: Measure and control jitter, loss and latency with appropriate QoS and traffic engineering. Which observed outcome BEST verifies that the intended security protection operates, rather than merely appearing in a plan?

  1. Average network throughput doubles while live voice still suffers large measured jitter.
  2. A congestion test demonstrates bounded jitter and acceptable interactive call quality.
  3. Calls connect successfully, but packet arrival variance spikes during controlled congestion.
  4. A speed test shows high download rates while users report late and clipped audio under load.

Explanation

Correct Answer

B:

A congestion test demonstrates bounded jitter and acceptable interactive call quality. Real-time communications depend on packet timing, not aggregate throughput alone.

Incorrect Answers

A:

Aggregate bandwidth is not the relevant interactive-quality acceptance metric.

C:

A successful SIP setup does not prove adequate RTP timing.

D:

Bulk transfer speed cannot establish low-jitter real-time operation.

Question 274

A security architect claims NAT makes an internal database unattackable by outsiders. Which correction is MOST accurate?

  1. Enforce explicit stateful network filtering and application authorization; NAT alone only changes addressing/mappings.
  2. Keep NAT but remove all firewall rules because private addresses are cryptographically secret.
  3. Treat a successful TCP connection through NAT as evidence of database authorization.
  4. Replace identity checks with random outbound port mappings.

Explanation

Correct Answer

A:

Translation may obscure addresses but is not a standalone access-control or input-validation policy.

Incorrect Answers

B:

Private addressing and NAT do not cryptographically authenticate clients or inspect application actions.

C:

Routing and session setup do not establish resource-level permission.

D:

Port allocation does not substitute for authenticated, authorized database access.

Question 275

A NAT gateway is combined with correct firewall filtering. Which risk remains?

  1. NAT automatically validates every SQL statement.
  2. NAT prevents an insider from initiating outbound traffic.
  3. A firewall rule can only operate when NAT is disabled.
  4. An authorized application session can still exploit a database flaw or issue unauthorized object requests.

Explanation

Correct Answer

D:

L3/L4 network controls cannot substitute for data-layer authorization and secure input handling.

Incorrect Answers

A:

Address translation is unaware of SQL semantics.

B:

Many NAT deployments specifically enable outbound connectivity.

C:

Filtering and translation routinely coexist in network designs.

Question 276

Which test BEST proves database access policy rather than only NAT functioning?

  1. Confirm that the externally observed source IP differs from the private address.
  2. Check that the NAT device has processed many packets.
  3. Verify an administrator can browse the NAT configuration screen.
  4. From a denied source, attempt an unauthorized connection; from an allowed session, attempt a forbidden database operation and verify both are rejected.

Explanation

Correct Answer

D:

The two negative tests separate routing/filter enforcement from data-layer authorization.

Incorrect Answers

A:

A changed source IP proves translation, not security authorization.

B:

Traffic volume does not prove denial of prohibited access.

C:

Administrative UI availability is unrelated to database authorization semantics.

Question 277

Employees join a lookalike guest wireless network that captures passwords through a forged portal. As the accountable security practitioner, which response BEST addresses the specific weakness without introducing a different untested control?

  1. Allow employees to join whichever hotspot broadcasts the familiar corporate SSID.
  2. Use enterprise mutual authentication with trusted server certificates and managed wireless profiles.
  3. Use a shared Wi-Fi password and disable trusted-server certificate verification to simplify onboarding.
  4. Trust all captured-portal sign-in pages if they use HTTPS from any certificate authority.

Explanation

Correct Answer

B:

A familiar SSID is not proof of access-point authenticity. Compromised client trust settings can defeat certificate validation, requiring endpoint governance.

Incorrect Answers

A:

An SSID is an unauthenticated label that a rogue device can copy.

C:

A shared secret without proper server authentication can enable evil-twin credential harvesting.

D:

A TLS page for a rogue domain is not proof it is the authorized enterprise access point.

Question 278

The organization implemented the response to this scenario: Employees join a lookalike guest wireless network that captures passwords through a forged portal. The approved response was: Use enterprise mutual authentication with trusted server certificates and managed wireless profiles. Which statement MOST accurately identifies a remaining risk or constraint?

  1. Compromised client trust settings can defeat certificate validation, requiring endpoint governance.
  2. Employees can safely trust a network whenever its SSID matches a remembered string.
  3. Certificate validation can be disabled when the wireless signal is strong.
  4. Enterprise EAP authentication remains phishing resistant if users accept unknown server certificates on first connection.

Explanation

Correct Answer

A:

A familiar SSID is not proof of access-point authenticity. A rogue access point with an untrusted certificate is rejected automatically.

Incorrect Answers

B:

An attacker can broadcast the same SSID to impersonate the legitimate network.

C:

Signal strength does not authenticate the access point or its authentication server.

D:

An untrusted server can capture or relay credentials when validation is bypassed.

Question 279

Management implemented a response after this event: Employees join a lookalike guest wireless network that captures passwords through a forged portal. The response was: Use enterprise mutual authentication with trusted server certificates and managed wireless profiles. Which observed outcome BEST verifies that the intended security protection operates, rather than merely appearing in a plan?

  1. The laptop automatically joins a rogue AP broadcasting the expected company SSID.
  2. Users can sign in through a lookalike captive portal even though the wireless server certificate is untrusted.
  3. A rogue access point with an untrusted certificate is rejected automatically.
  4. The AP signal is strong but the managed profile does not validate the authorized authentication endpoint.

Explanation

Correct Answer

C:

A rogue access point with an untrusted certificate is rejected automatically. A familiar SSID is not proof of access-point authenticity.

Incorrect Answers

A:

Automatic SSID matching is not proof of trusted wireless mutual authentication.

B:

Successful login may be attacker credential collection rather than secure network entry.

D:

Radio quality cannot demonstrate resistance to evil-twin impersonation.

Question 280

Visitors can reach sensitive file servers from the guest Wi-Fi because both networks share a permissive bridge. As the accountable security practitioner, which response BEST addresses the specific weakness without introducing a different untested control?

  1. Configure the guest and internal SSIDs on different VLAN numbers but permit unrestricted inter-VLAN routing.
  2. Use the same bridging domain for guests and employees while adding a welcome page.
  3. Isolate guest wireless traffic with restrictive layer 3 and application policy to approved internet services.
  4. Hide internal server DNS names from guests while permitting direct IP access to file shares.

Explanation

Correct Answer

C:

Authentication to guest Wi-Fi must not imply access to internal corporate assets. VLAN tagging alone is insufficient if upstream routing policies rejoin the networks.

Incorrect Answers

A:

VLAN separation alone does not enforce denial of sensitive internal access.

B:

A portal does not create the needed layer 2 and layer 3 isolation.

D:

Name resolution restrictions do not block unauthorized network paths.

Certified Information Systems Security Professional (CISSP) Practice Tests

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