d415 Software Defined Networking - Set 2 - Part 1

Correct Answer: The application and control layers

The northbound API connects the application layer and the control layer, enabling applications to communicate with the SDN controller to influence network behavior.

Correct Answer: Horizon

Horizon is the dashboard module in OpenStack that provides a GUI, making it easier for users and administrators to manage and monitor OpenStack services.

Correct Answer: Firewall

Firewalls are used to restrict access between a protected network and external networks, such as the internet, providing a key layer of security.

Correct Answer: Router

Routers are responsible for connecting different local area networks (LANs), allowing devices on separate networks to communicate with each other.

Correct Answer: Virtual extensible LAN

VXLAN is a network virtualization technology that improves scalability in large cloud deployments by encapsulating Layer 2 Ethernet frames within Layer 4 UDP packets.

Correct Answer: Cinder

Cinder is the OpenStack service that provides persistent block storage, allowing VMs to store data that persists even after the VM is shut down.

Correct Answer: Beacon

Beacon is an open-source SDN controller known for its modular and multi-threaded design, which supports flexible SDN application development.

Correct Answer: Network Functions Virtualization

NFV moves network functions like firewalls and routers from dedicated hardware appliances to software running on servers, improving network flexibility and scalability.

Correct Answer: OpenFlow

OpenFlow allows SDN controllers to manage flow tables in switches, enabling centralized control of network traffic and facilitating dynamic adjustments.

Correct Answer: NOX

NOX was among the first publicly available OpenFlow controllers, playing a significant role in the early development of software-defined networking (SDN).

Correct Answer: Handling packets

The SDN data plane is responsible for handling and forwarding packets according to the instructions received from the control plane.

Correct Answer: OpenFlow

OpenFlow is the most widely used protocol in SDN, facilitating communication between the control plane and forwarding devices like switches.

Correct Answer: Separation of control and data planes

SDN separates the control plane from the data plane, enabling centralized control of network devices and more flexible network management.

Correct Answer: Northbound API

The northbound API in SDN abstracts low-level network functions, allowing higher-level applications to program the behavior of the network.

Correct Answer: To manage flow tables and make routing decisions

The SDN control plane is responsible for managing flow tables, making routing decisions, and directing traffic flows within the network.

Correct Answer: Neutron

Neutron is the OpenStack module responsible for networking services, including the creation and management of virtual networks, routers, and subnets.

Correct Answer: Application plane

The application plane in SDN is responsible for telemetry and communicates required network behaviors to the SDN controller.

Correct Answer: Glance

Glance is the OpenStack module that manages virtual machine images, synchronizing them across the compute cluster for efficient VM deployment.

Correct Answer: To manage communications between the control plane and data plane devices

The southbound API in SDN allows the control plane to communicate with data plane devices like switches, enabling the controller to manage network traffic.

Correct Answer: Data plane

The data plane is responsible for processing and forwarding packets according to instructions received from the control plane.