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. https://www.acadiatech.com/blog/build-sdn-ibn-network/
blog article
BUILD A NEXT GEN NETWORK WITH SDN AND IBN
Historically, configuring network switches, firewalls and other infrastructure components was a slow, largely manually process. Generally, a network operator entered configuration changes through the Command Line Interface for each piece of equipment.  The old-fashioned approach was inflexible, the installation process was time-consuming, and the deployments were error-prone. READ MORE