知乎的技术架构是什么样的？

CDN是什么？使用CDN有什么优势？

既然一个 IP 地址可以被多个域名绑定，那么服务端是如何区分各个域名的?

互联网到底怎样才能赚钱呢？雷军的回答是互联网最厉害的是靠机器赚钱。当用户量达到一定规模，只要开着服务器就可以赚钱。而服务器贷款成本逐年下降，新增一个用户的编辑成本几乎是为零的。因为互联网带来了信息传播的便利性，口碑营销在互联网时代非常重要。互联网公司靠提供服务来挣钱，而软件公司靠卖产品来挣钱。是两种完全不同的模式，前者是靠服务积累用户量，再靠向用户收取“小费”的方式，更看用户量的增长。而后者则是卖产品，收费的方式决定了业务不容易持续稳定增长。互联网的关键就是快，需要快速测试，快速获取用户的反馈， 快速调整上线。

永远不要在微博上和人对线，甚至没必要参与讨论。毕竟微博是一个本科率只有4% 的地方，大部分人不能保持一个客观的态度看待问题，而在中文互联网这个偏激的舆论环境下，大部分的网民都很容易走向偏激。没有人关注事实和逻辑，大家只希望听到脑子里希望听到的声音。

气压式机器人有助于减轻重量和零部件数量。争取每台的价格降低到1亿日元以下，只有达芬奇核心机型的约一半。川嶋健嗣称，“我们的目标客户是院内已经有机器人的大型医院等，争取获取第2台需求”，第一年的目标销量为10台左右。

Danny Hillis, my mentor as we were working at Thinking Machines in the early 1980s, often said, “We want to build a machine that will be proud of us.” We were bringing up the next generation. In my conversations with Carl Feynman at that time, we thought if we were going to be bringing up our new overlords, they should at least read good books. While not of the Internet yet, the computer we were building did share the recognition of the importance of the network, of the interconnections of the links. The machine we were building was called the “Connection Machine,” where the connections between the processors were seen as important as the tens of thousands of processors themselves. The difference between this machine and the Internet was that these processors were not yet spread around the world.This imagining of a machine’s view of us, a machine that is distinct from us, a machine that has evolved beyond us, brings me around to my original ill-formed vision in 1980 of what I could help make the Internet become: a network of people, the library, and machines. I did not see it in a light that was either glorifying or terrifying, but rather as a major inevitable project that could be built well or badly, and I could help build it well. In that way it could be a major positive step forward.

So, who really did invent the Internet?

The plan for NDN is one approach to what's known as information centric networking (ICN), an idea with roots in Ted Nelson's 1980s experiments with hypertext. It wasn't until 2006, however, when projects at Stanford, the University of Texas at Austin, and at the legendary Xerox PARC launched the idea into the networking mainstream. Internet pioneer and PARC researcher Van Jacobson, whose talk at Google in 2006 has been widely cited as the start of the ICN movement, is now a leader of the NDN project alongside Zhang.

For now, the Solid technology is still new and not ready for the masses. But the vision, if it works, could radically change the existing power dynamics of the Web. The system aims to give users a platform by which they can control access to the data and content they generate on the Web. This way, users can choose how that data gets used rather than, say, Facebook and Google doing with it as they please. Solid’s code and technology is open to all—anyone with access to the Internet can come into its chat room and start coding. “One person turns up every few days. Some of them have heard about the promise of Solid, and they are driven to turn the world upside down,” he says. Part of the draw is working with an icon. For a computer scientist, coding with Berners-Lee is like playing guitar with Keith Richards. But more than just working with the inventor of the Web, these coders come because they want to join the cause. These are digital idealists, subversives, revolutionaries, and anyone else who wants to fight the centralization of the Web. For his part, working on Solid brings Berners-Lee back to the Web’s early days: “It’s under the radar, but working on it in a way puts back some of the optimism and excitement that the ‘fake news’ takes out.”

The idea is simple: re-decentralize the Web. Working with a small team of developers, he spends most of his time now on Solid, a platform designed to give individuals, rather than corporations, control of their own data. “There are people working in the lab trying to imagine how the Web could be different. How society on the Web could look different. What could happen if we give people privacy and we give people control of their data,” Berners-Lee told me. “We are building a whole eco-system.”