CISSP Practice Questions: Communication and Network Security Domain

Published: June 9, 2025 | 5 min read

Test your CISSP knowledge with 5 practice questions from the Communication and Network Security domain. Includes detailed explanations and answers.

CISSP Practice Questions

Master the Communication and Network Security Domain

Test your knowledge in the Communication and Network Security domain with these 5 practice questions. Each question is designed to help you prepare for the CISSP certification exam with detailed explanations to reinforce your learning.

Question 1

In an effort to comply with GDPR, your company must ensure secure data transmission across the network. Which strategic initiative should you prioritize to achieve this goal?

A) Develop a robust incident response plan.

B) Implement data loss prevention (DLP) tools.

C) Ensure encryption of data in transit using industry standards.

D) Conduct regular security awareness training.

Show Answer & Explanation

Correct Answer: C

Explanation: Option C is correct because GDPR requires technical measures to protect personal data, and encrypting data in transit is a critical component. Option A is important for overall security but does not directly address data transmission security. Option B is useful for preventing data leaks but isn't specifically about transmission. Option D is valuable but too general for this specific need.

Question 2

A network security engineer is tasked with improving the confidentiality of data in transit across a corporate network. Which technology should be implemented to achieve this?

A) Network Address Translation (NAT)

B) Data Loss Prevention (DLP) systems

C) Encryption protocols such as IPsec

D) Intrusion Detection Systems (IDS)

Show Answer & Explanation

Correct Answer: C

Explanation: Encryption protocols like IPsec encrypt data packets, ensuring the confidentiality and protection of data as it traverses the network.

Question 3

Your organization plans to secure communications between distributed data centers located worldwide. Which strategic approach should you adopt to ensure data confidentiality and integrity?

A) Implement dedicated point-to-point leased lines.

B) Use public internet with robust encryption methods.

C) Deploy MPLS networks for secure routing.

D) Establish satellite links for all data transfers.

Show Answer & Explanation

Correct Answer: B

Explanation: Option B is correct because using the public internet with robust encryption such as VPNs or TLS ensures data confidentiality and integrity without the high cost of leased lines. Option A is secure but costly. Option C provides reliable routing but not necessarily encryption. Option D is impractical for large data transfers.

Question 4

In planning the network security strategy for a new Internet of Things (IoT) deployment, which strategic consideration is most critical to address potential security risks?

A) Standardize on a single IoT platform for easier management.

B) Focus on strong authentication mechanisms for IoT devices.

C) Implement a zero-trust architecture for IoT communications.

D) Rely on third-party security evaluations for all devices.

Show Answer & Explanation

Correct Answer: C

Explanation: Option C is correct as a zero-trust architecture assumes no inherent trust in any IoT device, enforcing strict access controls and monitoring, which is critical in mitigating IoT security risks. Option A may simplify management but does not address security. Option B is important but not as encompassing as zero trust. Option D provides assurance but does not directly secure the network.

Question 5

Your company is adopting a Software Defined Networking (SDN) architecture. What is the primary security concern that must be addressed strategically?

A) Ensuring sufficient network bandwidth.

B) Protecting the SDN controller from unauthorized access and compromise.

C) Configuring proper network segmentation.

D) Managing the complexity of the SDN architecture.

Show Answer & Explanation

Correct Answer: B

Explanation: The SDN controller is a central point of control and if compromised, the entire network's security is at risk. While the other options are important operational considerations, protecting the controller is the primary strategic security concern.

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About CISSP Certification

The CISSP certification validates your expertise in communication and network security and other critical domains. Our comprehensive practice questions are carefully crafted to mirror the actual exam experience and help you identify knowledge gaps before test day.