{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","uuid":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","normalized_title":"数字化生存20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","isbns":["9787121307362"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":362,"navigation_url":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104","title_url":"https://workshop.closeclaw.top/ai/title/%E6%95%B0%E5%AD%97%E5%8C%96%E7%94%9F%E5%AD%98%2020%E5%91%A8%E5%B9%B4%E7%BA%AA%E5%BF%B5%E7%89%88","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/bbcce9bd-b637-4fa6-8a80-dadabab80104","page_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/page","search_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/search"},"page":{"printed_page":172,"pdf_page":243,"physical_index":243,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"021e9bb5b233cee996f12989fab4d33d2f473fffe16f50f054fda5a4025c7ee9"},"chapter":"20周年纪念版 数字化生存 一本影响千百万人的互联网启蒙经典著作","content":"拓扑学的逻辑\n\n目前，信号进入家庭的电子路径有四条：电话、有线电视、卫星电视和空中广播。它们的差异主要表现在拓扑学（topology）意义上，而不是经济模式的交替上。如果我要在相同的时间，把相同的比特传送给美国大陆的每户人家，我显然应该利用一颗覆盖范围横跨东西海岸的卫星。这样做最符合拓扑学的逻辑。有些行为，比如说，把比特传送给美国境内22000个电话交换机中的每一个，就不符合这一逻辑。\n\n相反地，假如我要传送的是地方性新闻或广告，空中广播就是不错的方式，有线电视则更理想。电话在点对点的情况下，功效最佳。假如要我单纯依据拓扑学的逻辑来决定采用哪一种媒体，我会用卫星来转播橄榄球超级杯赛（SuperBow1)[3]，而用电话网络来传送互动式、个人化的“每周华尔街报道”(WallStreetWeek)。我们可以根据某一种路径最适合哪一种比特，来决定究竟是通过卫星、空中广播、有线电视还是电话网络来传输信号。\n\n改写距离的意义\n\n但是，在“现实世界”里(许多人总是提醒我这一点，好像我是活在一个不真实的世界里)，每个频道都希望广开财源，因此往往尝试去做自己最不擅长的事情。\n\n172\n\nbeing digital | 数字化生存\n\n[3]美国全国橄榄球联合会自1967年起每年举行一次的决赛。","previous_page":171,"next_page":173}