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Introduction to Cisco IOS Software

Chapter Description

This sample chapter introduces the fundamentals of Cisco IOS software, the operating system that runs on Cisco routers and switches.

Summary

This chapter introduced the fundamentals of Cisco IOS software, the operating system that runs on Cisco routers and switches. Cisco IOS software runs on a CPU and requires several types of memory to store the image, configuration, running applications, and data. The CLI is the most common method used to configure, monitor, and troubleshoot a system running Cisco IOS software. The software provides comprehensive debugging and logging capabilities. You can upgrade the software image by downloading it using one of many options and then following a series of simple steps.

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