1.1, 1.2, 1.3, 1.4

Chapter Overview of Infrastructure

  • Prepared by: Mudiana Mokhsin @Misron

Introduction to Infrastructure

  • Link to a video: [Watch the video](https://www.youtube.com/watch?v=UFQXN iHSXjg)

1.1 Basic Concepts and Definitions

  • IT Infrastructure Defined: Composite hardware, software, network resources, and services needed for operation and management of an enterprise IT environment.

    • Facilitates delivery of IT solutions and services to employees, partners, and customers.

    • Typically internal and deployed within owned facilities.

1.2 IT Infrastructure Components

  • Components:

    • Hardware:

      • Servers, computers, data centers, switches, hubs, routers.

    • Software:

      • ERP, CRM, productivity applications.

    • Network:

      • Network enablement, Internet connectivity, firewalls, security.

    • Meatware:

      • Human users (network administrators, developers). The human element is essential alongside hardware and software.

      • Also referred to as wetware or liveware.

Quote

  • "The weakest point in any system isn't the software, the hardware, it's the meatware. The human element" - Bucky Barnes

Enterprise IT Environment

  • Definition: Enterprise IT refers to hardware and software designed for large organizations.

    • Greater needs for availability, compatibility, reliability, scalability, performance, and security.

  • Distinction between Enterprise and Small Business IT Needs:

    • Small businesses often prioritize cost and expedience whereas large enterprises focus on compatibility and long-term needs.

  • "Enterprise-class" refers to products not governed by formal standards; product suitability should be assessed against specific organizational needs.

IT Components and Functions

  • Key components:

    • Cloud Computing:

    • Data Centers:

    • Computers:

    • Servers:

    • Storage:

    • Networking:

IT Infrastructure and Business Processes

  • IT infrastructure is foundational in serving customers and managing business processes.

  • Impact: Affects capabilities and services provided to customers, suppliers, and employees.

  • Infrastructure should align with the organization’s business and information systems strategy.

1.2 Framework/Model

  • ITIL V3:

    • Framework of best practices for IT infrastructure services.

    • Latest model is ITIL 4 (SVS).

ITIL SVS Overview

  • Represents how organizational components work collaboratively to facilitate value creation through IT-enabled services.

Timeline of ITIL Evolution

  • Evolution stages includes:

    • ITIL V1, V2, ISO 20000, ITIL V3, ITIL 2011, ITIL 4.

ITIL Evolution Context

  • CCTA (Central Computer and Telecommunications Agency):

    • Each version has built upon previous best practices.

1.4 IT Infrastructure Lifecycle

  • Engagement Framework: Ensures results throughout IT infrastructure lifecycle assessment, design, integration, and management.

Phases of IT Infrastructure Lifecycle

  • Planning: Define technical requirements and project timeline.

  • Deployment: Implement infrastructure components.

  • Integration: Critical processes for systems integration.

  • Management & Operations: Focus on support, monitoring, and security auditing.

    • IT Asset Management (ITAM) to prioritize improvements.

Computer Basics

1. Computer Hardware

  • Components:

    • CPU, Control Unit, ALU, Memory, Input-Output Units.

2. Computer Software

  • Types:

    • System Software, Programming Software, Application Software.

Network & Internet

1. Internet Applications

  • Used for:

    • Communication, Job searches, Health and Medicine, Travel, Shopping.

2. Size of The Internet

  • Based on the number of machines listed on DNS, not actual existence.

Client-Server Based Computing

  • Architecture: Involves software components interaction for multi-user systems.

    • Client: Personal computer requesting resources.

    • Server: High-performance machine supplying resources.

Cloud Computing

  • Definition: On-demand resource availability without direct management by users.

  • Categories:

    • IaaS, PaaS, SaaS, DaaS, CaaS, and other 'as-a-Service' concepts.

Advantages of Cloud Computing

  • Cost-effective, scalable, and flexible IT environment aligned with business strategy.

Understanding Cloud Computing Components

SaaS

  • Software as a Service: Subscription-based, centrally hosted applications.

PaaS

  • Platform as a Service: Framework for developing and deploying applications.

IaaS

  • Infrastructure as a Service: Provides backend server infrastructure and resources.

DaaS

  • Data as a Service: Database services delivered over the cloud.

BaaS

  • Backend as a Service: Services for application developers for backend management.

CaaS

  • Computer as a Service: Provides all IT needs as a service.

Cloud Models and Strategies

  • Discusses the separation of responsibilities across IaaS, PaaS, and SaaS and how these impact businesses.

Conclusion

  • Importance of understanding the architecture and evolution of IT infrastructure.