案例库 · 软件与 IT · 技术决策 · 1973–1983
这条还没译成中文，下面是英文原文。
TCP/IP beat OSI by being open, free and shipped inside every Unix.
DARPA published TCP/IP as open, royalty-free, vendor-neutral specs and gave away a reference implementation, so the world adopted it without asking.
Vint Cerf · Bob Kahn · DARPA
那一手
Through the 1970s, IBM, DEC, AT&T and Xerox built proprietary, mutually incompatible networks, and ARPANET's own protocols struggled to span radio, satellite and local links. Vint Cerf and Bob Kahn designed TCP/IP as a way to join many different kinds of network into one.
DARPA published the finalized TCP/IP specifications in September 1981 as freely available RFCs, and the suite was fundamentally non-proprietary, royalty-free and vendor-neutral: any computer could speak it so long as it implemented the software.
That openness was matched with implementation. The suite was distributed with BSD Unix, so a tested, working stack arrived inside the operating system that was sweeping through computing. The definition was public and the code was free, so there was no permission or licensing hurdle between anyone and the network.
When the United States moved ARPANET to TCP/IP on 1 January 1983, and as the OSI stack stayed bogged down in committees, the open suite became the foundation of the internet that followed.
为什么管用
- Open, royalty-free specifications removed any licensing or ownership reason to refuse the protocol.
- A free reference implementation inside BSD Unix meant the full stack arrived with the OS everyone was adopting.
- Being vendor-neutral let rivals both use it, which is what a common standard has to permit.
- Working, tested code beat a theoretically cleaner OSI that moved too slowly through committees.
可以搬走什么
A protocol that is open and free beats a better-designed but proprietary or slow-moving alternative, because adoption is a permission problem, not a quality problem.
后来呢
TCP/IP became the protocol of the internet, and the open-specification, free-implementation model it pioneered became the playbook for the standards bodies that followed, while the more elaborate OSI stack faded despite its richer design.
资料来源
- The Foundation of the Internet: TCP/IP Turns 40
- RFC 791: Internet Protocol (DARPA Internet Program Protocol Specification)
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