Most of you will not have the ability to download and upgrade that IOS to a new image. When you look for used gear, you can look for the used router, but you also need to know what IOS image that router has installed.
Each train can focus on other needs Cisco has for releasing software, for instance, some trains may strive to keep the code stable, while others add every new feature and therefore risk more bugs.
I could write a whole book about how to build a home lab, and this one little section would probably get a whole chapter in the book. Want eBooks? Want extra practice questions? Get the Premium Edition: CCNA 200-301 Official Cert Guide, Volume 2 Premium Edition eBook and Practice TestĪ Brief Overview of IOS Version Numbers that Matter 200-301 V2 Ch16: Controller-Based Networks.200-301 V2 Part 4: Network Architectures.200-301 V2 Ch12: Miscellaneous IP Services.200-301 V2 Ch05: Securing Network Devices.200-301 V2 Ch04: Security Architectures.200-301 V1 Ch25: Configure IPv6 Routing.200-301 V1 Ch24: Configure IPv6 Addressing.200-301 V1 Ch18: Troubleshooting Routing.200-301 V1 Ch16: Router Addresses and Routes.200-301 V1 Ch14: Analyzing IPv4 Subnets.200-301 V1 Ch12: Classful IPv4 Networks.Ibm Collaborative Lifecycle Management 6.0.6 Ibm Collaborative Lifecycle Management 6.0.6.1 Ibm Engineering Lifecycle Management 7.0 Ibm Engineering Lifecycle Management 7.0.1 Ibm Engineering Lifecycle Management 7.0.2 Ibm Engineering Lifecycle Optimization - Engineering Insights 7.0 Ibm Engineering Lifecycle Optimization - Engineering Insights 7.0.1 Ibm Engineering Lifecycle Optimization - Engineering Insights 7.0.2 Ibm Engineering Lifecycle Optimization - Publishing 7.0 Ibm Engineering Lifecycle Optimization - Publishing 7.0.1 Ibm Engineering Lifecycle Optimization - Publishing 7.0.2 Ibm Engineering Test Management 7.0.0 Ibm Engineering Test Management 7.0.1 Ibm Rational Doors Next Generation 6.0.6 Ibm Rational Doors Next Generation 6.0.6.1 Ibm Rational Doors Next Generation 7.0 Ibm Rational Doors Next Generation 7.0.1 Ibm Rational Doors Next Generation 7.0.2 Ibm Rational Engineering Lifecycle Manager 6.0.6 Ibm Rational Engineering Lifecycle Manager 6.0.6.1 Ibm Rational Quality Manager 6.0.6 Ibm Rational Quality Manager 6.0.6.1 Ibm Removable Media Manager 6.0.6 Ibm Removable Media Manager 6.0.6.1 Ibm Removable Media Manager 7.