The Cisco IOS

The Cisco IOS is the proprietary kernel that provides routing, switching, internetworking, and telecommunication features. Here are a few of the features that the Cisco router IOS is responsible for:

  • Scalability for network growth
  • Security to control access or to stop unauthorized personnel
  • Providing network protocols and its functions
  • Connecting network resources

Each IOS is specific to the series of router or switch you are using. What exactly do I mean by that? Well, let's look at some routers and what IOS they are using:

You can now see that it is important that the IOS matches the series of router or switch you're purchasing. ...

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