Cisco has a variety of modes that allow you to configure and troubleshoot. In this course, CCT Routing and Switching: Cisco IOS Software Operation, you'll learn about the different modes of operation and configuration parameters.
First, you'll explore Cisco IOS modes of operation. Next, you'll discover how to gather device and network information. Finally, you'll learn how to manage IOS files and licensing. When you're finished with this course, you'll have the skills and knowledge of Cisco IOS software operation needed to navigate the different modes and IOS operations.
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https://www.pluralsight.com/courses/cct-routing-switching-cisco-ios-software-operation-cert