I recall a practice question that mentioned service agents being used in orchestration, but I'm not confident about their role in enterprise service bus environments as mentioned in statement C.
I'm not entirely sure, but I feel like statement B might be misleading. I thought service agents could be used in various architectures, not just limited to service architecture.
Okay, let's see... I know Cisco Unified Border Element provides NAT and demarcation between networks, so that's two features. Now I just need to figure out the third one.
B is the way to go. Coupling the service contract to legacy resources would defeat the purpose of the Legacy Wrapper pattern. Gotta keep that abstraction layer clean!
C) The application of the Legacy Wrapper pattern supports the Contract Centralization pattern by helping to establish a standardized contract through which to access legacy resources.
I think C is the right answer. The Legacy Wrapper pattern helps standardize access to legacy resources, which supports the Contract Centralization pattern.
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