This is my first post :)
I have a question regarding the task 4.11.
On R2, the loopback0 is redistributed into OSPF by task 4.8. And Loopback0 is not part of the RIP domain.
So if I just do a redistribute ospf 1 on R2 under router rip, it won't redistribute loopback0 into RIP. So R6 won't have a route to loopback0 of R2, then it won't have full conectivity to all IGP routes.
To fix it, you can either 1) add loopback0 part of RIP domain, 2) redistribute it to RIP. But does break the rule because it is not in the tasks.
Thanks,