内容简介：Asking for software complexity is insane. Nobody wants software solutions that are complex. It is comparable with smart cities, intelligent lockdowns and safe banks. Nobody wants stupid cities, governmental panic measurements to fight covid-19 or a bank th
Asking for software complexity is insane. Nobody wants software solutions that are complex. It is comparable with smart cities, intelligent lockdowns and safe banks. Nobody wants stupid cities, governmental panic measurements to fight covid-19 or a bank that can not be trusted with handling money.
Customers and end-users never ask for software that is complex. So software that is hard to adjust, maintain and is often unreliable. But designing simple software solutions is not simple and requires good principles along with solid experience.
When creating software solutions you should aim for simplicity because simplicity is a prerequisite for reliability. Simple is often erroneously mistaken for easy and cheap. Simple is the opposite of complex.
Simple IS NOT easy
What matters for simple software solutions is:
- Does the software do what is supposed to do?
- Is it of high quality?
- Can you rely on it?
- Can problems be fixed easy if needed? And against acceptable cost and by anyone?
- Can the software handle changing business requirements over time?
The answer to these questions are always trade-offs:
- Fast versus slow.
- Expensive versus cheap.
- Robustness versus flexibility. And:
- Good versus Bad. Which is always biased and context dependent. There is never only one good solution. But there are always many more bad solutions.
Benefits of software simplicity are: ease of understanding, ease of change, ease of debugging, flexibility. Building simple open software solutions means you should at least:
- Make a simple conceptual model. This model should cover all aspects, so also the key business aspects.
- Define simple Solution Building Blocks (SBBs) for the software parts. Solutions building blocks describe in logic terms what is required for each component.
- Choose or create simple software solutions that match the requested capabilities.
And since even simple solutions must be secure you use the key open principles of the open reference architecture for security and privacy .
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计算机网络（第5版）
Andrew S. Tanenbaum、David J. Wetherall / 严伟、潘爱民 / 清华大学出版社 / 2012-3-1 / 89.50元
本书是国内外使用最广泛、最权威的计算机网络经典教材。全书按照网络协议模型自下而上（物理层、数据链路层、介质访问控制层、网络层、传输层和应用层）有系统地介绍了计算机网络的基本原理，并结合Internet给出了大量的协议实例。在讲述网络各层次内容的同时，还与时俱进地引入了最新的网络技术，包括无线网络、3G蜂窝网络、RFID与传感器网络、内容分发与P2P网络、流媒体传输与IP语音，以及延迟容忍网络等。另......一起来看看 《计算机网络（第5版）》 这本书的介绍吧!
