9.3.4

Which APIs do individual networking devices use to communicate with the control plane from the Physical layer?

Southbound

Network engineers have the option of using software to configure and control the network rather than relying on individual static configuration files that are located on each network device. Which of the following is a relatively new technology that allows network and security professionals to use software to manage, control, and make changes to a network?

Software-defined networking (SDN)

Which of the following BEST describes the Physical SDN layer?

Also known as the Infrastructure layer.

Which SDN layer would a load balancer that stops and starts VMs as resource use increases reside on?

Application

Which of the following BEST describes the Application SDN layer?

Communicates with the Control layer through the northbound interface.

Which of the following is a disadvantage of software defined networking (SDN)?

SDN standards are still being developed.

Which of the following is an advantage of software-defined networking (SDN)?

More granular contro

Which of the following does the Application layer use to communicate with the Control layer?

Northbound APIs

Software defined networking (SDN) uses a controller to manage devices. The controller is able to inventory hardware components on the network, gather network statistics, make routing decisions based on gathered data, and facilitate communication between devices from different vendors. It can also be used to make widespread configuration changes on just one device. Which of the following best describes an SDN controller?

The SDN controller is software.

Drag the software defined networking (SDN) layer on the left to the appropriate function on the right. (Each SDN layer may be used once, more than once, or not at all.)

This layer receives its requests from the Application layer. Control layer This layer is also known as the Infrastructure layer. Physical layer This layer communicates with the Control layer through what is called the northbound interface. Application layer This layer provides the Physical layer with configuration and instructions. Control layer On this layer, individual networking devices use southbound APIs to communicate with the control plane. Physical layer