MCQs

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1. What is the primary goal of Software-Defined Networking (SDN) in cloud computing?
   a. To centralize network management
   b. To decentralize network control
   c. To limit network scalability
   d. To increase network latency
   Answer: a. To centralize network managementt4tutorials+1
2. Which layer does SDN primarily focus on within the OSI model?
   a. Physical layer
   b. Data link layer
   c. Network layer
   d. Application layer
   Answer: c. Network layergeeksforgeeks+1
3. What is the most commonly used protocol for communication between the SDN control plane and the data plane?
   a. TCP
   b. UDP
   c. OpenFlow
   d. HTTP
   Answer: c. OpenFlowtutorialspoint+1
4. Which component centralizes network intelligence and control in SDN?
   a. Physical switch
   b. Network device firmware
   c. SDN controller
   d. Orchestration tool
   Answer: c. SDN controllernetworklessons+2
5. Which SDN architecture separates the control plane from the data plane?
   a. Virtual Networking
   b. Overlay Networking
   c. OpenFlow
   d. OpenStack
   Answer: c. OpenFlowt4tutorials+1
6. In SDN, what term describes programmable interfaces between a controller and applications?
   a. Southbound APIs
   b. Northbound APIs
   c. Control Switches
   d. Overlay APIs
   Answer: b. Northbound APIsgeeksforgeeks+1
7. What is the role of the infrastructure layer in SDN?
   a. Holds the controller logic
   b. Legacy hardware monitoring
   c. Physical data forwarding devices
   d. Application software
   Answer: c. Physical data forwarding devicesnetworklessons+1
8. What type of devices form the SDN data plane?
   a. Controllers
   b. Physical and virtual switches
   c. Authentication servers
   d. Firewalls
   Answer: b. Physical and virtual switchesgeeksforgeeks+1
9. Which interface in SDN handles communication between control and infrastructure layers?
   a. Northbound
   b. Southbound
   c. Westbound
   d. Eastbound
   Answer: b. Southboundnetworklessons+1
10. Which SDN benefit is most relevant for cloud-scale data centers?
    a. Static routing
    b. Centralized automation
    c. Manual configuration
    d. Reduced device footprint
    Answer: b. Centralized automationscribd+1
11. What does “decoupling” mean in the context of SDN?
    a. Separating data and storage
    b. Separating network control from forwarding functions
    c. Unifying hardware interfaces
    d. Merging switches
    Answer: b. Separating network control from forwarding functionsgeeksforgeeks+1
12. Which enables dynamic routing and policy application in SDN?
    a. CLI scripts
    b. Manual port settings
    c. Programmable APIs
    d. Direct cable connection
    Answer: c. Programmable APIsvmware+1
13. What kind of SDN can use REST APIs to invoke device functions?
    a. Open SDN
    b. SDN via APIs
    c. SDN via Overlays
    d. Hybrid SDN
    Answer: b. SDN via APIsscribd+1
14. What is the main advantage of SDN for network security?
    a. Fixed device settings
    b. Centralized policy enforcement and monitoring
    c. VLAN grouping only
    d. Decentralized firewall deployment
    Answer: b. Centralized policy enforcement and monitoringgeeksforgeeks
15. SDN improves deployment of new services primarily by:
    a. Increasing latency
    b. Programmatic configuration
    c. Simplifying cable management
    d. Limiting bandwidth
    Answer: b. Programmatic configurationvmware+1
16. Which SDN application creates multiple isolated networks on a shared physical infrastructure?
    a. Network slicing
    b. VLAN tagging
    c. Port mirroring
    d. Trunking
    Answer: a. Network slicingt4tutorials+1
17. Which feature allows SDN to support rapid network evolution?
    a. Static access control lists
    b. Application-level programmability
    c. CLI templates
    d. Preconfigured VLANs
    Answer: b. Application-level programmabilitynetworklessons+1
18. OpenFlow is an example of which SDN interface/protocol?
    a. Northbound
    b. Southbound
    c. Universal Plug and Play
    d. Legacy SNMP
    Answer: b. Southboundnetworklessons+1
19. Which layer in SDN stack hosts the controller?
    a. Infrastructure
    b. Control
    c. Data
    d. Application
    Answer: b. Controlgeeksforgeeks+1
20. What is a major difference between SDN and traditional networking?
    a. Static addressing in SDN
    b. SDN has distributed control plane
    c. SDN centralizes the control plane
    d. SDN lacks programmability
    Answer: c. SDN centralizes the control planenetworklessons+1
21. Which SDN component typically interacts with cloud orchestration platforms?
    a. Control plane
    b. Application layer
    c. Data plane
    d. Southbound device
    Answer: b. Application layergeeksforgeeks+1
22. What protocol helps enable virtualization of network services in SDN?
    a. HTTP/2
    b. OpenFlow
    c. SMTP
    d. SNMP
    Answer: b. OpenFlowt4tutorials+1
23. Which technology works closely with SDN to virtualize network functions?
    a. SAN
    b. Network Function Virtualization (NFV)
    c. RAID
    d. SD-WAN
    Answer: b. Network Function Virtualization (NFV)t4tutorials+1
24. What makes hardware vendor-agnostic operations possible in SDN?
    a. Dedicated firmware
    b. Application abstraction
    c. Hardware lock-in
    d. ASIC-only devices
    Answer: b. Application abstractionvmware+1
25. Which cloud network deployment model is enhanced most by SDN?
    a. Traditional client-server
    b. Distributed mesh
    c. Centralized data center
    d. Peer-to-peer
    Answer: c. Centralized data centervmware+1
26. What best explains the role of SDN in cloud data centers?
    a. Reducing server virtualization overhead
    b. Centralizing control plane for better scalability
    c. Minimizing storage requirements
    d. Eliminating the need for hypervisors
    Answer: b. Centralizing control plane for better scalabilityscribd+1
27. What is the benefit of SDN’s centralized network view?
    a. Increases broadcast domain size
    b. Simplifies troubleshooting and optimization
    c. Reduces packet size
    d. Fixes IP addresses
    Answer: b. Simplifies troubleshooting and optimizationnetworklessons+1
28. In hybrid SDN, which approach is used?
    a. All hardware-based config
    b. Combination of traditional and SDN networking
    c. Virtual interface only
    d. OpenStack exclusively
    Answer: b. Combination of traditional and SDN networkinggeeksforgeeks
29. Which SDN model is commonly implemented using OpenFlow switches?
    a. Open SDN
    b. API SDN
    c. Layer 4 SDN
    d. Hybrid SDN
    Answer: a. Open SDNgeeksforgeeks
30. SDN enhances which virtualization aspect in cloud environments?
    a. Network virtualization
    b. Storage virtualization
    c. CPU virtualization
    d. Memory virtualization
    Answer: a. Network virtualizationscribd
31. In SDN, what is the function of the Path Computation Element (PCE)?
    a. Encrypt data payloads
    b. Compute optimal paths
    c. Emulate DNS behavior
    d. Deep packet inspection
    Answer: b. Compute optimal pathsscribd
32. Which protocol does a network device use to communicate with an SDN controller in most architectures?
    a. BGP
    b. SNMP
    c. OpenFlow
    d. RIP
    Answer: c. OpenFlowt4tutorials+2
33. What enables SDN-based network automation?
    a. Hand-editing configs
    b. RESTful Northbound APIs
    c. Binary transfer only
    d. Static routing tables
    Answer: b. RESTful Northbound APIsvmware+2
34. Which SDN use case is directly linked to efficient resource allocation in the cloud?
    a. Stable spanning tree
    b. Elastic scaling
    c. Single-tenant mode
    d. Dedicated hardware
    Answer: b. Elastic scalingscribd+1
35. What allows SDN controllers to manage multi-vendor environments?
    a. Vendor-specific APIs
    b. Open standards and APIs
    c. Only proprietary interfaces
    d. No APIs
    Answer: b. Open standards and APIsvmware+1
36. What is an important consideration for SDN security in the cloud?
    a. Controller redundancy and hardening
    b. SNMP traps only
    c. Access lists on all switches
    d. All static configurations
    Answer: a. Controller redundancy and hardeningvmware+1
37. Which of the following is a main SDN advantage for cloud deployments?
    a. Fixed bandwidth allocation
    b. Dynamic policy and resource management
    c. Direct hardware tying
    d. High redundancy of legacy switches
    Answer: b. Dynamic policy and resource managementscribd+2
38. Which SDN approach is least effective for data center agility?
    a. Open SDN
    b. SDN via APIs
    c. Overlay-based SDN
    d. Hypervisor SDN
    Answer: b. SDN via APIsscribd
39. How does SDN enable hybrid cloud bursting?
    a. Static host routing
    b. Dynamic resource and inter-controller allocation
    c. Manual device changes
    d. Local-only flow tables
    Answer: b. Dynamic resource and inter-controller allocationscribd
40. Which SDN capability is used in multi-tenant cloud environments?
    a. Single VLAN per tenant
    b. Network isolation via slicing
    c. MAC address pinning
    d. Static access lists
    Answer: b. Network isolation via slicingscribd
41. How does SDN support rapid disaster recovery in cloud networks?
    a. Maintaining manual backups
    b. Centralized, programmable policy push
    c. VLAN hopping
    d. Secondary SNMP management modules
    Answer: b. Centralized, programmable policy pushvmware+1
42. Which is NOT a benefit of SDN in cloud networking?
    a. Vendor lock-in
    b. Centralized management
    c. Programmatic flexibility
    d. Application-aware routing
    Answer: a. Vendor lock-invmware+1
43. What is the key principle behind SDN-based cloud security monitoring?
    a. Distributed routers
    b. Central view with rapid response to threats
    c. Packet loss prioritization
    d. Fixed ACLs only
    Answer: b. Central view with rapid response to threatsgeeksforgeeks+1
44. What makes SDN controllers critical to cloud scalability?
    a. Enforced single point of hardware
    b. Automated and programmable flow management
    c. Increased manual oversight
    d. Mandatory vendor-specific tools
    Answer: b. Automated and programmable flow managementvmware+1
45. SDN frameworks can programmatically optimize which resource in the cloud?
    a. Storage size
    b. Network bandwidth and flows
    c. Direct I/O only
    d. Terminal emulators
    Answer: b. Network bandwidth and flowsgeeksforgeeks+1
46. What architecture enables full virtual network stacks on shared hardware in SDN?
    a. Hypervisor overlay
    b. Physical mesh only
    c. Circuit-switched backbone
    d. Static layer 2 bridges
    Answer: a. Hypervisor overlayscribd+2
47. What is the central layer of SDN called?
    a. Application Layer
    b. Infrastructure Layer
    c. Control Layer
    d. Forwarding Layer
    Answer: c. Control Layeripcisco+2
48. Which SDN use case assists with Wi-Fi offloading for mobile providers?
    a. Channel bonding
    b. Network slicing
    c. Multi-operator Wi-Fi sharing
    d. Bridge looping
    Answer: c. Multi-operator Wi-Fi sharingscribd
49. What is the relationship between SDN and NFV in network design?
    a. Competing frameworks
    b. Complementary for full virtualization
    c. Unrelated layers
    d. Redundant features
    Answer: b. Complementary for full virtualizationt4tutorials+1
50. How does SDN reduce operational complexity in large networks?
    a. By introducing distributed management
    b. By centralizing control and using automation
    c. By assigning static rules
    d. By limiting device types
    Answer: b. By centralizing control and using automationnetworklessons+2

1. https://t4tutorials.com/software-defined-networking-sdn-mcqs/
2. https://www.geeksforgeeks.org/computer-networks/software-defined-networking/
3. https://www.tutorialspoint.com/software-defined-networking/quiz_on_what-is-software-defined-networking.htm
4. https://networklessons.com/cisco/ccna-routing-switching-icnd2-200-105/introduction-to-sdn-software-defined-networking
5. https://www.scribd.com/document/874328267/SDN-mcq
6. https://www.vmware.com/topics/software-defined-networking
7. https://ipcisco.com/quiz/what-is-sdn-ccna/
8. https://study.com/academy/practice/quiz-worksheet-software-defined-network-sdn-overview.html
9. https://www.studocu.com/in/quiz/sdn-notes/950251
10. https://www.scribd.com/document/620320880/SDN-answers-1
11. https://www.scribd.com/document/435986473/MCQ-in-cloud-docx
12. https://www.cse.wustl.edu/~jain/cse570-21/ftp/m_15sdn.pdf
13. https://studyguides.com/study-methods/multiple-choice/cm3qbp2q1055j46r58yxl7tca?questionId=cm3qbp3h8055k46r5d429w21l
14. https://wayground.com/admin/quiz/5ea715f09e7551001b68c3f8/sdn-vmware
15. https://www.placementpreparation.io/mcq/cloud-computing/
16. https://www.sanfoundry.com/1000-cloud-computing-questions-answers/
17. https://www.studocu.com/in/document/arunachala-college-of-engineering-for-women/cloud-computing/ccs365-software-defined-networks-question-bank/107964149