Cisco IOS Command Line Interface Tutorial


The focus of this document is to introduce a new Cisco Internetworking Operating System (IOS) user to the IOS command line interface (CLI). After reading this document, a new user will understand how to use the IOS CLI to configure and manage an IOS router. For easier reference, Table 1 displays a collection of important terms and acronyms that are used throughout the document.

Table 1 – Glossary Of Important Terms And Acronyms Used In This Tutorial

Cisco IOS – Cisco Internetworking Operating System
CLI – Command Line Interface
EXEC – Command line session to the router (could be console, modem, or telnet)
Flash – Non-Volatile Memory used to store IOS software image
NVRAM – Non-Volatile RAM used to store router configuration
RAM – Random Access Memory

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