6.2 Traditional Networks and Controller-Based Networking Flashcards
Examine traditional networks with controller-based networking. (16 cards)
What is a traditional network?
A network where devices are individually configured and managed.
In traditional networking, each device must be manually configured, which can lead to errors and inefficiencies.
Define:
controller-based networking
A network where a central controller manages and configures devices.
Controller-based networking simplifies configuration by automating tasks and ensuring consistency across the network.
What are the components of a controller-based network architecture?
- Controller
- Network devices
- Northbound and southbound APIs
Controller: Manages the network by making decisions and enforcing policies.
Network devices: Devices like switches and routers that execute the policies set by the controller.
Northbound APIs: Facilitate communication between the controller and applications.
Southbound APIs: Enable communication between the controller and network devices.
True or False:
Controller-based networking requires minimal interaction with physical network devices.
False
While a controller simplifies management by centralizing control, network devices still perform key functions like data forwarding and packet processing.
How does controller-based networking improve network management?
It centralizes control, making management simpler and faster.
With a controller-based approach, all network devices are managed from one place.
True or False:
In traditional networks, device configurations are done manually.
True
Manual device configuration in traditional networks increases the chance of errors and makes changes slower.
Define:
software-defined networking (SDN)
Refers to the separation of the control plane from the data plane.
This separation allows centralized management, offering flexibility in network configuration and enabling more efficient policy and traffic management by a centralized controller.
What is the role of the data plane in controller-based networking?
It handles data forwarding based on the policies set by the controller.
The data plane is responsible for processing packets and ensuring they reach their destination, but the controller determines how data should be handled.
How does SDN differ from traditional networks?
SDN centralizes control, while traditional networks distribute control.
In SDN, the separation of control and data planes enables faster, more flexible network management, unlike traditional networks, where control is distributed across individual devices, making them more complex to manage.
True or False:
Controller-based networks use a distributed control model.
False
Controller-based networks use a centralized model, where the controller manages all devices.
Fill in the Blank:
In controller-based networking, the device that directly manages network traffic and policies is called the ______.
controller
A controller allows easier management of large networks by automating policy enforcement and configuration across devices.
What is the main advantage of controller-based networking over traditional networks?
Centralized management and automation.
A controller allows easier management of large networks by automating policy enforcement and configuration across devices.
Why is automation an important feature of controller-based networking?
It reduces manual work and increases network consistency.
Automation allows faster deployment of changes and ensures policies are uniformly applied across all devices in the network.
True or False:
In traditional networks, network policies must be applied on a per-device basis.
True
Traditional networks require manual configuration for each device, making them slower to adapt to changes.
How does controller-based networking improve security?
By applying policies centrally.
Centralized control ensures uniform enforcement across all devices, allowing the network to quickly adapt to security threats and apply policies simultaneously to all connected devices.
True or False:
In controller-based networks, the controller manages both the control and data planes.
False
The controller manages the control plane, while the data plane is typically handled by the devices, ensuring efficient data forwarding.
