Hee,hee... Did you ever get running again after telling the local net you were the best path to the internet?? heh,heh... Bet you pissed them off good!
We run OSPF locally, trying to keep individual areas under 100 routers, and BGP accross the core. OSPF is pretty good- though still a work in progress. Its metrics scale well, and convergence is typically quite fast. There are some issues with LSA flooding, but proper area sizing and good route summarization, helps keep it from eating up too much bandwidth.
We use POS or 'packet over sonet' on our Core circuits connecting the core backbone swouters. Future plans call for gig-e or 10 gig via dark fiber. That should give us lots more headroom as the DWDM gear continues to get lit.
Telemetry is currently using CLNS, Mostly due to a past shortage of IP, but now we plan to IP all the system switches- mostly for better management. Ever try to download an IOS accross a 9600 async oobm connection? Yes? How bout on 6000 individual switches?...
The lab is working with terrabit-e. its been up now for about 6 months- Boston to Denmark to NY,NY. So far so good.
I'm still waiting for the holographic protocols to show up! heh,heh...
Now for your question- For your CCNA all you will be asked about is RIP/IGRP and maybe 1 or 2 questions on EIGRP or OSPF. It is the world according to Cisco, so only Cisco routing protocols will be focused on. Spend your time there.
[8D]