Automation and Programmability

Domain 6 is the smallest domain by weight, but it is also the one that feels most foreign to people coming from a pure “type commands into a router” background. The good news is that it is almost entirely conceptual. There are no subnetting calculations, no complex configurations, and no tricky show-output interpretation. You need to understand why networks are being automated, how a controller-based network differs from a traditional one, what the pieces of a software-defined architecture are called, how REST APIs and JSON work, and what tools like Ansible and Terraform do. If you can read a JSON snippet and answer “what is the value of this key?”, and you can explain the difference between a northbound and a southbound API, you will pick up easy points here.