201. What is the primary benefit of Wi-Fi 7's Multi-Link Operation (MLO)?
- a) Simultaneous transmission across multiple frequency bands
- b) Longer range than Wi-Fi 6
- c) Backward compatibility with Wi-Fi 4
- d) Lower power consumption
Answer: A - MLO aggregates 2.4GHz, 5GHz, and 6GHz bands for higher throughput and reliability (IEEE 802.11be).
202. Which protocol enables service mesh functionality in Kubernetes networks?
- a) Istio
- b) BGP
- c) OSPF
- d) SNMP
Answer: A - Istio provides traffic management, security, and observability for microservices via Envoy sidecars.
203. What is the purpose of the OpenFlow protocol in SDN?
- a) Communication between control plane and data plane
- b) Encrypting management traffic
- c) Replacing TCP/IP
- d) Prioritizing video streams
Answer: A - OpenFlow allows SDN controllers to program flow tables in switches (ports 6653/6633).
204. Which technology enables sub-1ms latency in 5G Advanced networks?
- a) Time-Sensitive Networking
- b) Network Slicing
- c) Massive MIMO
- d) Beamforming
Answer: A - TSN (IEEE 802.1Qbv) provides deterministic latency for industrial IoT and XR applications.
205. What does the eBPF verifier ensure?
- a) Safe execution of BPF programs in the kernel
- b) Encryption of network traffic
- c) Compatibility with legacy protocols
- d) QoS prioritization
Answer: A - The verifier checks for infinite loops, valid memory access, and other safety conditions.
206. Which Wi-Fi 7 feature doubles channel bandwidth compared to Wi-Fi 6?
- a) 320 MHz channels
- b) 4096-QAM
- c) Multi-RU
- d) Puncturing
Answer: A - 320MHz channels in 6GHz band enable 46Gbps theoretical throughput.
207. What is the primary use of the gRPC protocol in cloud-native networks?
- a) High-performance microservices communication
- b) Encrypting storage traffic
- c) Legacy system integration
- d) DNS resolution
Answer: A - gRPC uses HTTP/2 and Protocol Buffers for efficient RPCs between distributed services.
208. Which technology enables network functions to scale dynamically in cloud environments?
- a) Kubernetes CNI plugins
- b) BGP route reflectors
- c) OSPF areas
- d) VLAN trunking
Answer: A - CNI (Container Network Interface) plugins like Calico or Cilium manage pod networking and scaling.
209. What is the purpose of the QUIC transport protocol?
- a) Reducing connection establishment latency
- b) Encrypting optical signals
- c) Prioritizing IoT traffic
- d) Replacing Ethernet
Answer: A - QUIC (RFC 9000) combines TLS 1.3 and HTTP/3 with 0-RTT handshakes over UDP.
210. Which Wi-Fi 7 innovation improves spectrum efficiency in crowded environments?
- a) Punctured transmission
- b) 1024-QAM
- c) OFDMA
- d) Target Wake Time
Answer: A - Puncturing allows transmissions around occupied channels without requiring contiguous 320MHz.
211. What does the Service Mesh Interface (SMI) standard provide?
- a) Common abstraction layer for service meshes
- b) Encryption for legacy systems
- c) Quantum-safe routing
- d) Optical network management
Answer: A - SMI defines TrafficSplit, TrafficSpecs, and TrafficTarget CRDs for interoperable service mesh management.
212. Which technology enables AI-driven traffic engineering in WANs?
- a) Reinforcement Learning-based routing
- b) Blockchain ledger
- c) Quantum key distribution
- d) Optical burst switching
Answer: A - RL agents continuously optimize paths based on latency, loss, and congestion feedback.
213. What is the primary benefit of deterministic networking (DetNet)?
- a) Guaranteed packet delivery within fixed time bounds
- b) Higher bandwidth
- c) Backward compatibility
- d) Lower power consumption
Answer: A - DetNet (IEEE 802.1CM) provides bounded latency/jitter for industrial automation and vehicle networks.
214. Which protocol enables zero-trust service-to-service authentication?
- a) SPIFFE/SPIRE
- b) OAuth 2.0
- c) RADIUS
- d) SNMPv3
Answer: A - SPIFFE provides cryptographic identity documents (SVIDs) for workloads across environments.
215. What is the purpose of the Multi-Resource Block (MRB) in Wi-Fi 7?
- a) Flexible allocation of frequency resources
- b) Encrypting management frames
- c) Extending signal range
- d) Prioritizing AR/VR traffic
Answer: A - MRB allows combining non-contiguous RUs (Resource Units) for efficient spectrum utilization.
216. Which technology provides distributed firewall capabilities for containers?
- a) Cilium eBPF
- b) VLAN ACLs
- c) BGP Flowspec
- d) OSPF areas
Answer: A - Cilium implements identity-aware L3-L7 policies using eBPF programs in the kernel.
217. What does the Open vSwitch Database Protocol (OVSDB) manage?
- a) Virtual switch configurations
- b) Optical signal routing
- c) Quantum key distribution
- d) Blockchain transactions
Answer: A - OVSDB (RFC 7047) provides transactional control of virtual switch flows, ports, and tunnels.
218. Which innovation in 5G Advanced improves uplink performance?
- a) Full-Dimension MIMO
- b) Network Slicing
- c) Control/User Plane Separation
- d) Beamforming
Answer: A - FD-MIMO uses 3D beamforming to enhance uplink capacity for video uploads and IoT devices.
219. What is the purpose of the Network Service Mesh (NSM) project?
- a) Dynamic service-to-service connectivity across clusters
- b) Encrypting legacy protocols
- c) Quantum networking
- d) Optical signal processing
Answer: A - NSM provides L2/L3 connectivity between pods across Kubernetes clusters/clouds via adapters.
220. Which Wi-Fi 7 feature enhances multi-AP coordination?
- a) Coordinated Spatial Reuse
- b) 4096-QAM
- c) Multi-Link Operation
- d) Puncturing
Answer: A - CSR enables APs to collaboratively manage interference and channel access.