Practice 6.15.4
This layer communicates with the control layer through what's 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
This layer is also known as the infrastructure layer
Physical layer
Which of the following is a disadvantage of software-defined networking SDN?
SDN standards are still being developed
Network engineers have the option of using software to configure and intelligently control the network rather than relying on the individual static configuration files that are located on each network device. Which of the following is a relatively new tech that allows network and security professionals to use software to manage, control and make changes to a network?
Software-defined networking
Software-defined networking SDN uses a controller to manage the devices. The controller is able to inventory hardware components in 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 wide-spread configuration changes on just one device. Which of the following best describes an SDN controller?
The SDN controller is software.
You have opted to use software-defined networking SDN to manage, control and make changes to your network. You want to be able to use software to configure and intelligently ocntrol the network, rather than relying on the individual static configuration files that are located on each network device. SDN consists of 3 layers: Application layers; Control layers; Physical layers. Which of the following describes what the SDN control layer does to networking devices that comprise the physical layer?
The control layer removes the control plane from networking devices and creates a single control plane
This layer receives its requests from the application layer
control layer
