We have 3 tier models with DP applainces in Tier1 and Tiers 2 + backends in tier3. External world calls would and can only come through Tier1. Business services would be in Tier2 and only security Gateways only in Tier1.Tier3 will be the actual backend applications/java/mainframes etc.
So when we get the API Connect, should we publish the services i.e. business services both into tier2 and tier1 aswell ( both for catalog/governance aswell as runtime/realtime transactions calls)