Module 1: Introducing Application Networks and API-Led Connectivity

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Questions and Answers

How does API-led connectivity address the transformation delivery gap?

  • By outsourcing IT development to third-party vendors to increase capacity.
  • By building more complex IT systems to handle increasing demand.
  • By focusing on project-based approaches to ensure on-time delivery.
  • By using APIs to create reusable assets and encouraging self-service, enabling faster IT delivery. (correct)

In the context of API-led connectivity, what is the primary role of System APIs?

  • To provide access to core systems and data sources, such as databases or SAP. (correct)
  • To deliver data directly to end-user applications.
  • To orchestrate data flow across multiple systems.
  • To manage user authentication and authorization.

What is a key characteristic of modern APIs that distinguishes them from traditional web services?

  • They are primarily focused on backend system integration, ignoring the consumer's needs.
  • They lack security features, making them more flexible.
  • They are tightly coupled and require specific technical expertise to use.
  • They are designed for ease of consumption and discoverable through self-service. (correct)

What is the main purpose of a Center for Enablement (C4E) in an organization adopting API-led connectivity?

<p>To ensure APIs are productized, consumable, and broadly used, driving business innovation. (C)</p> Signup and view all the answers

Which of the following is a primary benefit of adopting an API-led connectivity approach compared to a traditional project-based approach?

<p>Improved governance, enhanced security, and better scalability through reusable APIs. (D)</p> Signup and view all the answers

How do feedback and usage metrics contribute to the success of an API-led connectivity strategy?

<p>They provide insights for continuous improvements and help in understanding API adoption. (D)</p> Signup and view all the answers

What is a potential drawback of a traditional, project-based approach to IT service delivery?

<p>It often leads to tight coupling between services, limiting the opportunity for reuse and creating governance challenges. (C)</p> Signup and view all the answers

Which layer of the API-led connectivity approach is responsible for tailoring data specifically for end-user consumption on devices like mobile phones and web applications?

<p>Experience APIs (B)</p> Signup and view all the answers

What is the purpose of using an API proxy in securing APIs?

<p>To manage access control, authentication, and other security policies. (B)</p> Signup and view all the answers

What does the HTTP status code 401 indicate in the context of a RESTful API?

<p>Authentication is required to access the resource. (A)</p> Signup and view all the answers

In the API development cycle, what is the role of RAML (RESTful API Modeling Language)?

<p>It is used for defining APIs. (A)</p> Signup and view all the answers

What is the primary way to measure the success of a Center for Enablement (C4E)?

<p>API adoption and reuse. (B)</p> Signup and view all the answers

Which of the following is NOT a key principle for successfully creating application networks using API-led connectivity?

<p>Strict control over who can access APIs. (D)</p> Signup and view all the answers

In the context of IT challenges, what is meant by the 'transformation delivery gap'?

<p>The increasing gap between the demand for IT services and IT's ability to deliver them. (B)</p> Signup and view all the answers

An organization wants to implement a new IT operating model that closes the delivery gap. Which of the following is a key enabler of this model?

<p>Building reusable APIs and services to encourage self-service. (C)</p> Signup and view all the answers

What is the primary goal of designing APIs for business use cases rather than backend systems?

<p>To ensure the APIs meet the specific needs of the business and are easier to understand and use. (A)</p> Signup and view all the answers

Besides OAuth, what is another security mechanism often used by secured APIs?

<p>SAML (D)</p> Signup and view all the answers

An API returns an HTTP status code of 201. What does this indicate?

<p>A new resource was successfully created (C)</p> Signup and view all the answers

What is the role of Line of Business (LoB) IT in API-led connectivity?

<p>To reuse APIs to build solutions. (B)</p> Signup and view all the answers

Which of the following is a business outcome of empowering the organization with API-led connectivity?

<p>Cost-effective IT solutions. (B)</p> Signup and view all the answers

Flashcards

IT Delivery Gap

The exponentially growing demand for IT services driven by digital competition, mobile applications, big data, and cloud solutions which IT struggles to keep up with.

New IT Operating Model

A new way of working where IT builds reusable APIs and services, enabling self-service and faster IT delivery.

Key Principles of API Consumption

APIs are discoverable and accessible, reusable, and continuously improved based on usage metrics.

System APIs

Directly accesses data from core systems, such as databases or SAP. Provides a record-oriented view of enterprise data.

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Process APIs

Orchestrates data from multiple systems into a consolidated view. Implements complex business logic and workflows.

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Experience APIs

Formats data for specific devices or channels, such as mobile apps or web interfaces. Optimizes the user experience.

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Center for Enablement (C4E)

A cross-functional team ensuring APIs are productized, consumable, and fully leveraged for business innovation.

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Application Network

Seamless integration of various services and platforms through interconnected applications.

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Unsecured APIs

Publicly accessible APIs that do not require any authentication.

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Secured APIs

APIs that require authentication via credentials, tokens, or API keys.

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API

A programing interface that enables communications with software compenents.

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Web Service

A method of communication between two systems over the internet.

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RESTful Web Services

Standard HTTP methods that provide a flexible, lightweight approach to system communication.

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Restful API Modeling Language

A modeling language for defining APIs

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RESTful APIs

Returns an HTTP status to indicate if the request was successful, a failure or required actions.

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Study Notes

  • IT faces the challenge of keeping up with the exponentially growing demand for IT services due to digital competition, mobile applications, big data and analytics, and cloud solutions.
  • The transformation delivery gap is the increasing difference between IT demand and IT delivery, which requires organizations to change their IT operating model.
  • A new IT operating model enables faster IT delivery by building reusable APIs and services.
  • Self-service is encouraged, so businesses can manage more of their own IT needs.
  • Key components of the new operating model include enablement and assets (reusable APIs) and consumption and innovation (business units using APIs).
  • The benefits of the new operating model are increased IT efficiency, reduced dependency on central IT, and faster project delivery.

API Consumption

  • Key principles include self-service, reusable assets, and feedback with usage metrics for continuous improvement.

Project-Based vs. API-Led Connectivity

  • Traditional project-based approaches, while on-time and meeting requirements, often limit reuse, create tight coupling, and are difficult to govern and scale.
  • Over time, project-based approaches lead to duplication, complexity, and governance issues.
  • Modern APIs are discoverable, accessible via self-service, easy to consume, secure, scalable, and high-performing.

API-Led Connectivity

  • Three layers of APIs are system, process, and experience.
    • System APIs access core systems.
    • Process APIs orchestrate data across systems.
    • Experience APIs deliver data to end users.
  • Benefits include promoting reuse, better governance, enhanced security, and scalability.

Organizational Empowerment

  • Developers discover and consume APIs, line of business IT reuses APIs, and central IT unlocks and decentralizes data access.
  • Business outcomes are faster time-to-market, cost-effective IT solutions, and improved scalability and security.

Center for Enablement (C4E)

  • A cross-functional team drives API-led connectivity.
  • The C4E ensures APIs are productized, published, consumable, and fully leveraged for business innovation.
  • Success is measured by API adoption and reuse.
  • Application networks allow seamless integration of various services and platforms.

RESTful APIs

  • Unsecured APIs are publicly accessible, while secured APIs require authentication via credentials, tokens or API keys.
  • An API proxy can manage access to secured APIs.
  • Security mechanisms include OAuth, SAML, and JWT.

HTTP Status Codes

  • Indicate request outcomes and help determine success, failure, and required actions.
  • Status codes:
    • 200: OK (request succeeded) for GET, DELETE, PATCH, PUT methods.
    • 201: Created (new resource added) for POST method.
    • 304: Not Modified (no changes made) for PATCH, PUT methods.
    • 400: Bad Request (invalid request syntax) for all methods.
    • 401: Unauthorized (authentication required) for all methods.
    • 404: Not Found (URI not recognized) for all methods.
    • 500: Server Error (general server issue) for all methods.

API Calls

  • Advanced REST Client (ARC) enables making GET, DELETE, POST, and PUT calls.
  • Unsecured APIs can be called directly.
  • Secured APIs require authentication.
  • API consoles allow interaction with managed APIs.

Application Networks

  • Key principles include self-service for developers, API discoverability, reusable assets, and feedback with usage metrics.
  • APIs should be easy to find and use.
  • Design APIs for business use cases, not backend systems.
  • API design-first approach involves gathering developer feedback and ensuring usability before implementation.

API Development Cycle

  • Involves analyzing, troubleshooting, testing, scaling, deploying, registering, securing, and monitoring.
  • RAML (RESTful API Modeling Language) is used for defining APIs.

Key Takeaways

  • Modern businesses require API-led connectivity to stay competitive.
  • APIs should be reusable, scalable, and secure.
  • C4E ensures API assets are productized, published, and consumed.
  • Application networks integrate multiple applications and data sources via APIs.

Key Concepts

  • Web Service: A method of communication between two systems over the internet.
  • API: A programming interface enabling communication between software components.
  • RESTful Web Services: Use standard HTTP methods and provide a flexible, lightweight approach to system communication.

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