What's changed: Initial version
6.1Network automation: traditional vs. controller-based
Covers the consistency, speed, and scale that network automation brings to operations; the split between the control plane (which decides where traffic goes) and the data plane (which actually forwards it); the difference between traditional (distributed) networking, where each device decides on its own, and controller-based networking, where a central controller consolidates those decisions; and using AI/ML to spot anomalies from operational data—all as practical judgment.
Manually configuring the same VLAN or ACL onto dozens of switches one device at a time inevitably lets typos and missed steps slip in, breeding audit gaps and outages. Network automation is the idea of handing such repetitive work to scripts or a controller to achieve configuration consistency, deployment speed, and the ability to scale. This section starts from the operational motivation—why automate at all—and then covers its prerequisite, the split between the control plane and the data plane, and the difference between traditional networking, where devices decide individually, and centralized controller-based networking, framed as device-selection and design judgment.
6.1.1How automation affects network management
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