Software-Defined Networking (SDN) MCQs
What is the primary goal of Software-Defined Networking (SDN)?
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 management
Which layer of the OSI model does SDN primarily focus on?
a) Physical layer
b) Data link layer
c) Network layer
d) Application layer
Answer: c) Network layer
Which protocol is commonly used in SDN architectures to communicate between the control plane and the data plane?
a) TCP
b) UDP
c) OpenFlow
d) HTTP
Answer: c) OpenFlow
What role does the SDN controller play in a Software-Defined Networking environment?
a) It manages physical network devices
b) It handles data forwarding decisions
c) It centralizes network intelligence and control
d) It ensures data privacy and security
Answer: c) It centralizes network intelligence and control
Which SDN architecture separates the control plane from the data plane and manages the network centrally?
a) Virtual Networking
b) Overlay Networking
c) OpenFlow
d) OpenStack
Answer: c) OpenFlow
In SDN, what component is responsible for forwarding data packets based on instructions from the SDN controller?
a) OpenFlow switch
b) Router
c) Firewall
d) Load balancer
Answer: a) OpenFlow switch
Which organization developed the OpenFlow protocol widely used in SDN environments?
a) Cisco
b) VMware
c) Google
d) Open Networking Foundation (ONF)
Answer: d) Open Networking Foundation (ONF)
Which SDN concept allows network administrators to define and manage network behavior dynamically through software rather than configuring individual devices?
a) Network Function Virtualization (NFV)
b) Centralized Control
c) Programmability
d) Virtualization
Answer: c) Programmability
Which SDN component is responsible for translating high-level network policies set by administrators into specific network configuration commands?
a) SDN controller
b) Data plane
c) Northbound API
d) Southbound API
Answer: c) Northbound API
Which technology enables SDN to separate the forwarding plane from the control plane in network devices?
a) Virtualization
b) Overlay networks
c) OpenFlow
d) MPLS
Answer: c) OpenFlow
Which SDN approach utilizes virtual switches and controllers to create virtual networks on top of physical networks?
a) Overlay SDN
b) Underlay SDN
c) Hybrid SDN
d) Integrated SDN
Answer: a) Overlay SDN
Which SDN architecture integrates traditional networking technologies with SDN principles?
a) Overlay SDN
b) Underlay SDN
c) Hybrid SDN
d) Integrated SDN
Answer: d) Integrated SDN
Which SDN component communicates with network devices such as switches and routers to instruct them on how to handle data packets?
a) Northbound API
b) Southbound API
c) SDN controller
d) OpenFlow switch
Answer: b) Southbound API
Which SDN characteristic allows for faster deployment and configuration changes compared to traditional networking approaches?
a) Centralized control
b) Programmability
c) OpenFlow protocol
d) Network abstraction
Answer: b) Programmability
Which SDN concept allows for the dynamic allocation of network resources based on application demand?
a) Network Function Virtualization (NFV)
b) Scalability
c) Elasticity
d) Quality of Service (QoS)
Answer: c) Elasticity
Which technology is essential for SDN to efficiently handle and route traffic across a network?
a) MPLS
b) OpenFlow
c) VPN
d) IPsec
Answer: b) OpenFlow
Which SDN feature allows administrators to define and enforce security policies across the network from a centralized location?
a) Quality of Service (QoS)
b) Traffic Engineering
c) Network Segmentation
d) Policy-Based Routing
Answer: d) Policy-Based Routing
Which SDN architecture focuses on optimizing traffic flow and ensuring efficient use of network resources?
a) Underlay SDN
b) Overlay SDN
c) Centralized SDN
d) Traffic Engineering
Answer: d) Traffic Engineering
Which SDN technology enables network administrators to partition their physical network into multiple virtual networks for better resource utilization?
a) Network Function Virtualization (NFV)
b) Network Slicing
c) MPLS
d) IPsec
Answer: b) Network Slicing
Which SDN characteristic allows for easier troubleshooting and monitoring of network activities?
a) Centralized management
b) Traffic engineering
c) Quality of Service (QoS)
d) Network abstraction
Answer: a) Centralized managementWhich SDN component is responsible for collecting network data and feeding it to the SDN controller for decision-making?
a) Northbound API
b) Southbound API
c) OpenFlow switch
d) Network Monitoring Agent
Answer: d) Network Monitoring Agent
Which SDN architecture uses network overlays to create virtual networks on top of existing physical networks?
a) Underlay SDN
b) Overlay SDN
c) Centralized SDN
d) Integrated SDN
Answer: b) Overlay SDN
Which protocol is commonly used for communication between SDN controllers and switches in an OpenFlow-based SDN environment?
a) TCP/IP
b) HTTP
c) SNMP
d) OpenFlow
Answer: d) OpenFlow
Which SDN concept allows network administrators to define policies and rules that dictate how traffic should be handled across the network?
a) Traffic Engineering
b) Quality of Service (QoS)
c) Policy-Based Routing
d) Network Segmentation
Answer: c) Policy-Based Routing
Which SDN approach focuses on optimizing the physical network infrastructure to support SDN deployments?
a) Underlay SDN
b) Overlay SDN
c) Centralized SDN
d) Integrated SDN
Answer: a) Underlay SDN
Which SDN architecture integrates traditional networking devices with SDN controllers to manage network traffic and policies?
a) Overlay SDN
b) Underlay SDN
c) Hybrid SDN
d) Integrated SDN
Answer: d) Integrated SDN
Which SDN concept allows for the automatic provisioning and configuration of network services using software?
a) Network Function Virtualization (NFV)
b) Service Chaining
c) Elasticity
d) Orchestration
Answer: d) Orchestration
Which SDN component provides an interface for applications and orchestration systems to communicate with the SDN controller?
a) Northbound API
b) Southbound API
c) OpenFlow protocol
d) Network Abstraction Layer
Answer: a) Northbound API
Which SDN characteristic allows for the dynamic allocation of network resources based on changing traffic patterns?
a) Elasticity
b) Quality of Service (QoS)
c) Traffic Engineering
d) Load Balancing
Answer: a) Elasticity
Which technology allows SDN to create logical network segments that are independent of physical network infrastructure?
a) VLAN
b) MPLS
c) IPsec
d) OpenFlow
Answer: a) VLAN
Which SDN feature enables administrators to optimize network performance by controlling how traffic flows through the network?
a) Traffic Engineering
b) Quality of Service (QoS)
c) Policy-Based Routing
d) Load Balancing
Answer: a) Traffic Engineering
Which SDN architecture focuses on managing network services and policies centrally while leveraging existing network infrastructure?
a) Overlay SDN
b) Underlay SDN
c) Centralized SDN
d) Integrated SDN
Answer: d) Integrated SDN
Which protocol allows SDN controllers to communicate with network devices and orchestrate traffic flows based on policies?
a) SNMP
b) OpenFlow
c) BGP
d) HTTP
Answer: b) OpenFlow
Which SDN characteristic allows for easier scalability of network resources without requiring changes to physical network infrastructure?
a) Programmability
b) Virtualization
c) Elasticity
d) Abstraction
Answer: c) Elasticity
Which SDN technology provides a framework for virtualizing network functions such as firewalls, load balancers, and routers?
a) Network Function Virtualization (NFV)
b) Service Chaining
c) OpenStack
d) MPLS
Answer: a) Network Function Virtualization (NFV)
Which SDN component maintains a centralized view of the entire network and makes decisions on traffic forwarding and network policies?
a) OpenFlow switch
b) SDN controller
c) Northbound API
d) Southbound API
Answer: b) SDN controller
Which SDN architecture focuses on creating virtual networks that run on top of physical infrastructure to provide flexibility and isolation?
a) Underlay SDN
b) Overlay SDN
c) Centralized SDN
d) Integrated SDN
Answer: b) Overlay SDN
Which SDN concept allows for the creation of multiple virtual networks on shared physical infrastructure to improve resource utilization?
a) Network Slicing
b) Network Abstraction
c) Quality of Service (QoS)
d) Load Balancing
Answer: a) Network Slicing
Which SDN technology enables the deployment of network services and applications as virtual instances rather than physical devices?
a) Virtualization
b) Overlay Networking
c) Network Function Virtualization (NFV)
d) Software-Defined WAN (SD-WAN)
Answer: c) Network Function Virtualization (NFV)
Which SDN characteristic allows for the separation of control and data planes to enable centralized network management?
a) Programmability
b) Abstraction
c) Centralization
d) Decoupling
Answer: d) Decoupling