Brief Introduction to Cisco router IOS

Everyone is very interested in new knowledge. Many may not be familiar with Cisco router IOS. This article is a brief introduction to Cisco router IOS, hoping to give you a basic understanding of IOS software. After decades of development, from the first four-node ARPANET to the ubiquitous Internet, computer networks have penetrated into our lives.

With the explosive growth of the computer network scale, as a router to connect devices also become more important. When a company builds a network, how to reasonably configure and manage the router becomes one of the important tasks of the Network Manager. This topic describes how to configure a cisco router from the simplest configuration. Many readers are very vague about the concept of a router. In fact, as mentioned in many documents, a router is a computer with multiple network interfaces.

This kind of special computer also has similar hardware like CPU, memory, system bus, input and output interface and PC, but it provides different functions than ordinary computers. Like a common computer, a router also needs a software operating system. In a cisco router, this operating system is called an Internet Operating System, which is the most common cisco router IOS software. Next, let us learn the most basic router configuration method step by step.

In fact, there is no need to make the router think so complicated. In fact, the router is a computer with multiple ports, but it plays a different role in the network than the general PC. Like a common computer, a router also needs an operating system. cisco calls this operating system a cisco interconnected network operating system, which is also known as the cisco router IOS, all cisco routers IOS are an embedded software architecture. The cisco router IOS software provides the following network services:
1. Basic routing and switching functions.
2. reliable and secure access to network resources.
3. scalable network structure.

The cisco command line interface (CLI) uses a hierarchical structure that completes specific tasks in different modes. For example, to configure a vro interface, you must enter the interface configuration mode of the vro. All configurations are only applied to this interface. Each configuration mode has a specific command prompt. EXEC provides a command interpretation service for the IOS software of the cisco router. When each command is typed, EXEC runs the command.