Summary
You have completed a complex routing topology, and although it may not be a network you will ever need to configure, you have discovered how to route IP with any routing protocol and subnet addressing.
IP routing algorithms are complex, and the ability to configure OSPF or RIP correctly and ensure network connectivity is a rare skill, not found in many engineers.
It is now up to you to take the skills you learned in this book and extend them further, even into areas you thought you could never master. For example, as a further exercise, you could modify the topology in Figure 9-1 and change the routing algorithms in use to see whether you can maintain a fully routable network.
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