1. 系统架构：
系统架构是一个概念模型，它描述了多个组件和子系统的结构和行为，如多个软件应用程序、网络设备、硬件，甚至系统的其他机器。架构描述语言 (ADL) 有助于描述整个系统架构。所以这是一个更广泛的话题。系统架构可以大致分为集中式和分散式架构组织。
2. 软件架构：
软件架构是指创建软件系统高层结构的过程。它是关于整个系统的完整结构/体系结构，意味着它将可扩展性、安全性、可重用性、可扩展性、模块化、可维护性等软件特性转换为满足业务需求的结构化解决方案。在定义系统架构时遵循多个高级架构模式和原则。它主要侧重于系统的外部可见组件及其相互之间的交互。
系统架构和软件架构的区别：
| S.No. | SYSTEM ARCHITECTURE | SOFTWARE ARCHITECTURE |
|---|---|---|
| 01. | System architecture is a conceptual model that describes the structure and behavior of multiple components and subsystems like multiple software applications, network devices, hardware, and even other machinery of a system. | Software architecture refers to the process of creating high level structure of a software system. |
| 02. | It focuses on the entire system. | Where as software architecture focuses on the components. |
| 03. | Various types of system architectures are Hardware architecture, Enterprise Architecture, Collaborative system architecture. | Various software architecture patterns include Serverless Architecture, Event Driven Architecture, Micro Service Architecture. |
| 04. | It helps to define low level infrastructure of a software. | It helps to define high level infrastructure of a software. |
| 05. | What we are building overall is system architecture. | What we are building individually is software architecture. |
| 06. | System architecture includes elements of both software and hardware and is used to enable design of such a composite system. | Software architecture considers different factors such as Business strategy, human dynamics, quality attributes, design, and IT environment etc. |
| 07. | It defines structure, behavior and view of a system. | It defines the solutions to meet technical and business requirements. |
| 08. | So in one line overall view of all components and their relationship is called system architecture. | So in one line individual component and its relationship with other is called software architecture. |
| 09. | For example system architecture of an order entering system contains web front end, business layer service, web backend, data base etc. | For example software architecture is one component of ordering system is web front end which consist of responsive user interface, view controller, web services and many more. |