A system architecture is a descriptive representation of the functionality of the components of a system and the flow of communication between those components. This definition immediately raises some important questions:
• What is a “component”?
• What functions are relevant?
• What is a communication flow?
For Task 4
to deliver a risk assessment for your organization, you must replace the organization’s risk appetite with your own. In fact, what the assessment tries to achieve is the risk tolerance of the organization, not the individual risk appetite of each assessor.
1. How does each individual system contribute to the organization’s overall risk exposure?
2. Each attack surface – How does protection in the presence (or absence) of active threat agents and their skills, methods, and objectives in each case, if any, affect the specific risk profile of the system?
3. How do all the risks to the system add up to constitute the organization’s computer security risk posture?
Security Architecture and Design
System Architecture is a descriptive representation of the functionality of system components. Components refer to individual parts of the system architecture. They contain fundamental properties of system architecture, relational schemas, constraints, connections and links between all components (Wiley, 2021). Architecture encompasses the key physical properties, structure, style, interactions, and overall purpose of a system. More precisely, components form the architecture of the system. Architecture is the overall design and how the different components work together to achieve the overall goal of the system.
These components are a simulation of what the architecture would contain when functional and assembled. Architecture gives value to a system. Architecture defines the structure, behavior and critical points that affect the system. The above components work together to realize the overall system. Descriptive representation means picking out the mentioned features and describing them in detail. For example, an organizational system architecture could be customers, merchants, transaction systems, and payment gateways. When the components of each are put together, the result is the system architecture.
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