Question
Design a secure, decentralized Deployment Diagram representing an Online Banking Infrastructure across multi-tiered hardware execution nodes, protocol wrappers, and security zones.
Answer :
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Skip in 10
A secure, decentralized deployment diagram for an Online Banking Infrastructure should represent the physical arrangement of hardware nodes, software components, communication protocols, and security zones. In OOAD, a Deployment Diagram shows how executable software artifacts are deployed on hardware devices and how these nodes communicate. For an online banking system, the architecture should use multiple tiers and strong security controls to protect customer credentials, transactions, and financial data. At the client tier, users access the banking system through web browsers or mobile applications running on customer devices. These devices communicate with the banking infrastructure through HTTPS using TLS encryption. A protocol wrapper such as an HTTPS/TLS interface handles secure communication between clients and external banking services. Multi-factor authentication can be implemented through an authentication service, with OTP or token-based verification providing an additional security layer. The first server-side zone is the Internet or public access zone. A Web Server node receives HTTPS requests and acts as the entry point for customers. A Web Application Firewall (WAF) can inspect incoming traffic and block malicious requests such as SQL injection, cross-site scripting, and abnormal traffic patterns. A load balancer can distribute requests among multiple web servers, preventing a single server
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