Core IT, Information Systems, and Role Vocabulary

This chapter establishes the vocabulary used throughout ISC. The goal is not to memorize isolated buzzwords, but to understand the terms well enough to follow control, governance, and assurance discussions accurately.

In This Chapter

• Key Information Technology Definitions introduces the foundational terms used across systems and controls topics.
• System Components, Networks, and Data Flow Essentials explains the basic architecture language needed for later chapters.
• Common IT Roles and Responsibilities in Organizations clarifies who does what in a typical technology environment.

How to Use This Chapter

• Read this chapter early if technical wording is slowing down your comprehension.
• Focus on distinctions that change the meaning of a control or risk discussion.
• Return here whenever an ISC question is harder because the terminology is unclear, not because the concept is advanced.

In this section

• Key Information Technology and Information Systems Definitions
  Core IT and information-systems definitions used throughout ISC.
• System Components, Network Basics, and Data Flow Essentials
  System components, network basics, and data-flow concepts for ISC.
• Common IT Roles, Responsibilities, and Organizational Separation
  Common IT roles, organizational separation, and interactions with finance and audit.