Thank you for your answer.

Not sure of the relevance of your last comment as I'm actually CCNA qualified and most of the way through my CCNP. I'd simply never come across OSPF v1 and only ever dealt with V2 or V3. I also have a responsibility to ensure the designs I implement are cost effective so if OSPF v1 would do the job I need to 100% be able to justify the choice for V2 and therefore the extra expense for the IP Services feature set!

Very good that you are certified.

Of course, nobody is expected  to know all the historic details about protocols to make them work.

Thank you for the nice rating and good luck!

"I don't want to shell out for IP services if OSPF v1 on IP Base will do the job." With this comment id say the person is an IT person. I Doubt end users would ask for such a question!!!

Agreed, such a question is likely to come from someone working in IT. However, I highly doubt they found OSPF V1 running on an IP Base image. More likely/probably, they encountered a subset of OSPF V2 supported on IP Base, usually one allowing OSPF to be extended to an edge device or to support a very tiny OSPF topology.

As Paolo noted, he didn't want to offend, but asking about using OSPF V1, does sound like a novice, or non-network engineer, whether in IT or not. If fact, it's a bit surprising that the person asking later notes they have a CCNA and have almost completed a CCNP, but then even CCIEs can stumble over somethings too. (To be clear, not knowing about OSPF V1 isn't the surprise, the surprise is asking about using it with IP Base because, again, what Cisco platform and IOS supports it?)

You have focused on the comment "I don't want to shell out for IP services if OSPF v1 on IP Base will do the job.", but again, where are they, or you, finding OSPF V1 running with IP Base? I believe Paolo's initial suggestion, that a more qualified individual be contacted, to assist, isn't unreasonable, whether the OP was in IT or not.