In the process of open and programmable evolution of CloudFabric network services, APIs evolve from atomic APIs to network service APIs and then to intent APIs Which of the following is a web…

Question

Options

• ARESTful API
• BRESFCONF API
• CNETCONF API
• DService Chain API

• A
  5% (1)
• B
  5% (1)
• C
  9% (2)
• D
  82% (18)

Explanation

Option D is correct because the Service Chain API operates at the network service layer, abstracting multiple underlying network functions into a cohesive, higher-level service interface - this is what Huawei's CloudFabric framework means by a "web service API" in its API evolution model.

NETCONF API (C) and RESTCONF API (B) are both atomic APIs: they configure individual network devices or elements directly and sit at the lowest layer of the evolution model. RESTful API (A) is an architectural style rather than a specific API in this hierarchy - while REST principles may underpin various APIs, it does not represent a distinct stage in the CloudFabric service evolution.

Memory tip: Think of the three layers as Device, Service, and Intent. NETCONF and RESTCONF talk to devices (atomic). Service Chain API links services together (network/web service layer). Intent APIs express business goals. "Chain" implies linking services - that is the middle layer.

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