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ICT 651 Exam Tips - Coggle Diagram

- - - - Companies choose for cloud services that are accessible only in their premises and not outside
    - - Supply limitless memory storage and expanded data transmission through the Internet to all organizations
    - - Combines services provided by private and public cloud
      - Enables consumers to have access to the information
      - Services are safeguarded to avoid any hacking or information leak
    - - Supervised, then managed by a different number of corporations
  - - - with complete customer acquisition flow and support
      - without any investment or risk of ownership
      - A2P
        
        Process of sending mobile messages from an application to a mobile user
        
        Also called enterprise or professional SMS
        
        Businesses can use it in several technical modes
        
        Communicate with consumers
        
        Authenticate users of online services
        
        Deliver time-sensitive alerts
      - Allowing mobile operators to run their entire A2P business
    - - Cloud provider install and maintain software in the cloud
      - Users run the software from cloud over the Internet
      - Require no installation of any application-specific software since cloud applications run in the cloud
      - Software licensing and delivery model in which software is licensed on a subscription basis and is centrally hosted
      - Typically accessed by end-users using a thin client, (web browser)
      - Common delivery model for many business applications
        
        office software
        
        messaging software
        
        DBMS software
    - - Provides the users with application platforms and databases as a service
      - Equivalent to middleware in the traditional delivery of application platforms and databases
      - Normally used by application developers, a development platform for application development as a portal, social media, e-commerce, IoT applications
      - Development and uses of PAAS
        
        As a public cloud service from a provider
        
        Consumer controls software deployment with minimal configuration options
        
        Cloud provider provides
        
        networks
        
        servers
        
        storage
        
        operating system
        
        middleware
        
        database
        
        As a private service
        
        (software or appliance) behind a firewall
        
        As software deployed on a public infrastructure
      - EXAMPLES OF PaaS Providers
        
        Google App Engine
        
        Microsoft Azure App Services
        
        Heroku
        
        AWS Lambda
        
        IBM Cloud Foundry
    - - Taking the physical hardware and going completely virtual
      - Infrastructure and hardware method running in the cloud
      - Uses by system administrator to setup their virtual server or computing platform
      - Technology
        
        Use of a cloud orchestration technology
        
        Open Stack
        
        Apache Cloudstack
        
        Open Nebula
        
        Manages the creation of a virtual machine and decides on which hypervisor to start it
        
        Enables VM migration features between hosts
        
        Allocates storage volumes
- - - - All the delivered implemented elements are assembled in only one step
    - - The delivered implemented elements are assembled as they become available
    - - one/ a very few implemented elements are added to an already integrated increment of implemented elements
    - - implemented element are assembled by subsets, and then subset are assembled together
    - - implemented element or aggregates are integrated in their activation or utilization order
    - - implemented elements/aggregates are integrated in the opposite order of their activation/utilization
    - - implemented element compare to the selected criterion are first integrated. Criteria are generally related to risks.
- - - - response time
      - Reliability
      - scalability
    - - Provide stakeholders with information about their application regarding speed, stability, and scalability.
      - determine whether their software meets speed, scalability and stability requirements under expected workloads
    - - Load testing
        
        checks the application's ability to perform under anticipated user loads
        
        identify performance bottlenecks before the software application goes live
      - Stress testing
        
        testing an application under extreme workloads to see how it handles high traffic or data processing
        
        identify the breaking point of an application
      - Endurance testing
        
        make sure the software can handle the expected load over a long period of time
      - Spike testing
        
        tests the software's reaction to sudden large spikes in the load generated by users
      - Volume testing
        
        check software application's performance under varying database volumes
      - Scalability testing
        
        determine the software application's effectiveness in "scaling up" to support an increase in user load
        
        helps plan capacity addition to your software system
  - - - Understand the setup for testing, including the physical environment and the tools available.
      - Helps identify challenges testers may face during performance testing.
    - - Includes goals and constraints for throughput, response times and resource allocation
    - - Figure out how different users are likely to use the system
      - Pick important scenarios to test all possible situations
      - Simulate different types of users, plan what data to use, and decide what measurements to collect.
    - - Prepare the testing environment before execution
    - - Create the performance tests according to test design
    - - Execute and monitor the tests
    - - Combine, analyze and share test results.
- - - - independent of vendors
      - products
      - technologies
    - - It logically represents a business activity with a specified outcome.
      - It is self-contained.
      - It may consist of other underlying services
      - It is a black box for its consumers.
    - - Service provider
        
        Creates a web service and provides its information to the service registry
      - service registry
        
        make the web service information available to any potential requester
      - Service requester or consumer
        
        locates entries in the service registry using various find operations
        
        binds to the service provider in order to invoke one of its web services
        
        can access multiple services if the service provides multiple services
      - Benefits
        
        Help businesses respond more quickly and more cost-effectively to changing market conditions
        
        Promotes reuse at the macro (service) level rather than micro (classes) level.
        
        Simplify interconnection to—and usage of—existing IT (legacy) assets.
      - Advantage implement SOA
        
        Services are Re-usable
        
        Services are Easily Maintained
        
        Reliability
        
        Availability
        
        Scalability
        
        High-Quality Services
        
        Platform Independence
        
        Increased Productivity
      - Characteristics
        
        Standardized Service Contract
        
        Loose Coupling
        
        Service Abstraction
        
        Service Reusability
        
        Service Autonomy
        
        Service Statelessness
        
        Service Discoverability
        
        Service Composability
        
        Service Interoperability
  - - - GET
        
        retrieve data from a server at the specified resource
      - POST
        
        send data to the API server to create or update a resource
      - PUT
        
        send data to the API to update or create a resource
      - DELETE
        
        Delete the resource at the specified URL
- - - - Organizations are pressured to digitize services rapidly to meet customer demands
      - Integration challenges hindering digital transformation efforts
    - - Line of business users is trying to develop digital customer experiences faster.
      - IT needs to drive cultural change by empowering the business to self-serve and deliver solutions quicker
    - - Organization shift towards a composable enterprise for agility and innovation.
      - Composable enterprise thinking creates more innovation, reduced costs, and better partnership
    - - Organizations using automation for operational efficiency and improve business processes
      - APIs important for driving automation and scaling productivity
    - - Focus on robust API security due to the proliferation of endpoints.
    - - Organizations turn to microservices to rapidly build new customer experiences.
      - Organizations can quickly adapt to changing customer requests and demands, and offer services that create a competitive edge
    - - Important to bring all data together from different systems to understand customers well and transform digitally
      - Teams need to focus on getting the data they need quickly, no matter where it is
    - - Organizations are investing in data analytics to transform customer experiences.
      - The value of data analytics depends on the quality of data.