Software Defined Network (SDN)

Software Defined Networking (SDN)

approach to networking that uses software-based controllers or APIs to communicate with underlying hardware infrastructure and direct traffic on a network

3 main types:

Open SDN

Hybrid SDN

SDN Overlay

Infrastructure as Code (IAC)

includes the provisioning of architecture in which deployment of resources is performed by scripted automation and orchestration

three portions of a typical network architecture

• control plane-decides where data goes

• data plane-moves the data

• management plane

Control Plane

carries the traffic that provides the signals to and from a router

data plane

carries user traffic on the network

Management Plane

administers the routers and switches inside the network and monitors traffic conditions and the status of the network

disadvantages of SDN

• single point of failure

• high vulnerability

Open SDN

open-source variant of SDN that relies on open-source technology

Hybrid SDN

network that employs traditional SDN protocols to operate itself

SDN Overlay

method of using software to create layers of network obstruction that can be used to run multiple virtualized network layers on top of a physical network