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What is the primary purpose of the TDC NET Cyber Defense Center?

• To develop cybersecurity software

• To sell cybersecurity services

• To enforce compliance with GDPR

• To protect critical national infrastructure by monitoring TDC NET’s network and systems

Answer explanation

The TDC NET Cyber Defense Center’s mission is to secure critical infrastructure by actively monitoring networks and systems to prevent cyber threats, ensuring a safer environment for national communications. Slide 5.

In Time-Sensitive Networking (TSN), what is the purpose of frame preemption?

• To delay all network traffic equally

• To allow high-priority traffic to bypass low-priority traffic

• To eliminate all network jitter

• To reduce the network’s overall speed

Answer explanation

Frame preemption in TSN ensures that critical or high-priority data is sent with minimal delay, enabling real-time communication by letting it “preempt” lower-priority traffic. Slide 4.

Which cybersecurity framework does TDC NET primarily follow?

• ISO 27001

• NIST Cybersecurity Framework

• SOC 2

• CIS Controls

Answer explanation

TDC NET’s Cyber Defense Center relies on the NIST Cybersecurity Framework, particularly focusing on its Detect and Respond functions, to guide its cybersecurity measures. Slide 7.

What is the main function of the Credit-Based Shaper (CBS) in Time-Sensitive Networking?

• To enforce strict time slots for all traffic

• To allocate bandwidth to low-priority traffic

• To control and manage bandwidth for bursty and conflicting traffic fairly

• To eliminate redundant data packets

Answer explanation

The Credit-Based Shaper in TSN manages network traffic, especially when bursts occur, to maintain efficient data flow without significant delay for critical applications. Page 9.

What principle does “defense in depth” rely on to protect computer systems?

• One single security layer

• A set of minimum security controls

• Multiple redundant security layers

• Complete isolation from external networks

Answer explanation

Defense in depth refers to implementing multiple layers of security to ensure that even if one layer fails, others can still protect the system from threats. Slide 10.