2.2 - Software Defined Networking Flashcards
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What has the advent of cloud computing changed in networking?
Cloud computing has changed networking by eliminating the need for physical routers, switches, and other infrastructure devices, requiring a shift to virtualized, cloud-based networking platforms.
What is Software Defined Networking (SDN)?
Software Defined Networking (SDN) is a method that transforms physical networking devices like switches, routers, and firewalls into software-based platforms that can be managed and operated in the cloud.
How are physical networking devices transformed in SDN?
Physical networking devices are broken down into individual functions or components, which are then virtualized and run as software versions in the cloud.
What are the three layers or planes in SDN?
The three layers or planes in SDN are: 1) Infrastructure layer (data plane), 2) Control layer (control plane), and 3) Management layer (management plane).
What does the infrastructure layer (data plane) do in SDN?
The infrastructure layer, or data plane, handles functions like forwarding, trunking, encrypting, and network address translation at the packet level.
What is contained in the control layer (control plane) of a networking device?
The control layer, or control plane, contains references for traffic routing such as dynamic routing protocols, forwarding tables, and network address translation tables.
What is the management layer (management plane) used for in SDN?
The management layer, or management plane, is used for managing the device through interfaces like SSH, graphical front ends, or APIs (Application Programming Interfaces).
How does SDN apply to a physical device like a switch?
In SDN, a physical device like a switch is abstracted into a software-based device with separate data plane, control plane, and management plane functionalities.
What is the role of the data plane in SDN?
The data plane in SDN handles the forwarding of traffic between different interfaces, similar to how a physical device would manage traffic at the packet level.
What does the control plane do in SDN?
The control plane in SDN manages routing protocols and maintains forwarding tables, similar to its role in physical devices but in a virtualized environment.
How is the management plane used in SDN?
The management plane in SDN is used for device management through secure access methods like SSH, SNMP, or APIs, allowing for configuration and monitoring.
What advantages does SDN provide in a cloud-based infrastructure?
SDN provides modular layers that extend across multiple devices, creating a flexible and scalable software-based version of traditional network devices for cloud-based deployments.
