141. What is the primary advantage of quantum key distribution (QKD) in networking?
- a) Unhackable encryption through quantum physics principles
- b) Faster data transmission speeds
- c) Lower latency routing
- d) Higher bandwidth allocation
Answer: A - QKD uses quantum entanglement to detect eavesdropping attempts, making interception theoretically impossible.
142. Which AI technique is used for predictive network failure detection?
- a) LSTM (Long Short-Term Memory) networks
- b) Generative Adversarial Networks
- c) Reinforcement Learning
- d) Convolutional Neural Networks
Answer: A - LSTMs analyze time-series network telemetry to predict anomalies before outages occur.
143. What additional frequency band does Wi-Fi 6E support compared to Wi-Fi 6?
- a) 6 GHz
- b) 2.4 GHz
- c) 5 GHz
- d) 60 GHz
Answer: A - Wi-Fi 6E adds the 6 GHz band (1200 MHz spectrum) for reduced congestion and higher throughput.
144. Which technology enables terabit-speed optical networks?
- a) Photonic Integrated Circuits
- b) Quantum repeaters
- c) Blockchain routing
- d) SD-WAN controllers
Answer: A - PICs combine lasers, modulators, and detectors on a single chip for ultra-high-density optical transmission.
145. What is the purpose of intent-based networking (IBN)?
- a) Automating network configuration based on business policies
- b) Encrypting all network traffic by default
- c) Prioritizing IoT device connections
- d) Replacing TCP/IP with quantum protocols
Answer: A - IBN uses machine learning to translate high-level business intent into network configurations.
146. Which protocol enables quantum-safe cryptographic key exchange?
- a) CRYSTALS-Kyber
- b) RSA-4096
- c) ECC-521
- d) AES-256
Answer: A - Kyber is a post-quantum lattice-based algorithm selected by NIST for standardization in 2022.
147. What does AIOps stand for in network management?
- a) Artificial Intelligence for IT Operations
- b) Automated Internet Protocol Systems
- c) Advanced Inter-Orbit Protocol
- d) Algorithmic Infrastructure Optimization
Answer: A - AIOps uses big data analytics and ML to automate network troubleshooting and optimization.
148. Which Wi-Fi 6E feature reduces interference in dense environments?
- a) Automated Frequency Coordination
- b) OFDMA subcarriers
- c) 1024-QAM modulation
- d) Target Wake Time
Answer: A - AFC dynamically manages 6 GHz channel assignments to avoid radar/incumbent interference.
149. What is the primary use of digital twins in networking?
- a) Virtual network modeling for simulation and testing
- b) Encrypting data in motion
- c) Replacing physical routers
- d) Blockchain transaction validation
Answer: A - Digital twins create real-time virtual replicas to predict network behavior under various conditions.
150. Which technology enables entanglement-based quantum networking?
- a) Quantum repeaters
- b) Optical amplifiers
- c) Blockchain nodes
- d) SDN controllers
Answer: A - Quantum repeaters extend entanglement distribution over long distances via quantum memory.
151. What is the maximum channel bandwidth in Wi-Fi 6E?
- a) 160 MHz
- b) 80 MHz
- c) 40 MHz
- d) 320 MHz
Answer: A - Wi-Fi 6E supports up to 160 MHz channels in the 6 GHz band (vs. Wi-Fi 6's 160 MHz in 5 GHz).
152. Which machine learning model optimizes traffic routing in real-time?
- a) Deep Q-Networks
- b) Random Forest
- c) SVM (Support Vector Machines)
- d) K-means clustering
Answer: A - DQNs use reinforcement learning to adapt routing paths based on dynamic network conditions.
153. What is the purpose of post-quantum cryptography in networking?
- a) Securing communications against quantum computer attacks
- b) Accelerating optical signal processing
- c) Reducing Wi-Fi interference
- d) Prioritizing IoT traffic
Answer: A - Post-quantum algorithms resist Shor's algorithm attacks on current public-key cryptography.
154. Which Wi-Fi 6E feature improves battery life for IoT devices?
- a) Target Wake Time
- b) MU-MIMO
- c) BSS Coloring
- d) OFDMA
Answer: A - TWT schedules wake periods for devices to minimize power consumption.
155. What does quantum teleportation enable in quantum networks?
- a) Transfer of quantum states between distant qubits
- b) Faster-than-light data transmission
- c) Optical signal amplification
- d) Blockchain consensus acceleration
Answer: A - Quantum teleportation transfers quantum information using entanglement and classical communication.
156. Which AI technique detects DDoS attacks in real-time?
- a) Anomaly detection with autoencoders
- b) Image recognition CNNs
- c) Text generation transformers
- d) Speech recognition RNNs
Answer: A - Autoencoders learn normal traffic patterns and flag deviations indicative of DDoS.
157. What is the primary benefit of 6 GHz spectrum for Wi-Fi 6E?
- a) 1200 MHz of contiguous interference-free spectrum
- b) Longer range than 5 GHz
- c) Better wall penetration than 2.4 GHz
- d) Compatibility with legacy devices
Answer: A - The 6 GHz band provides up to seven simultaneous 160 MHz channels without overlap.
158. Which technology enables quantum network repeaters to overcome fiber loss?
- a) Quantum memory
- b) Optical amplifiers
- c) Error correction codes
- d) Wavelength conversion
Answer: A - Quantum memories store entangled states to enable entanglement swapping across segments.
159. What is the purpose of BSS Coloring in Wi-Fi 6/6E?
- a) To identify overlapping networks and reduce interference
- b) To encrypt management frames
- c) To prioritize video traffic
- d) To extend signal range
Answer: A - BSS Color tags frames to distinguish neighboring networks, allowing spatial reuse.
160. Which NIST-standardized algorithm provides quantum-resistant digital signatures?
- a) CRYSTALS-Dilithium
- b) RSA-4096
- c) ECDSA
- d) SHA-3
Answer: A - Dilithium is a lattice-based signature scheme selected by NIST's Post-Quantum Cryptography project.