{"id":38322,"date":"2019-10-31T22:22:58","date_gmt":"2019-10-31T19:22:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3\/"},"modified":"2019-10-31T22:22:58","modified_gmt":"2019-10-31T19:22:58","slug":"v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/v-chrome-dobavlena-eksperimentalnaya-podderzhka-protokola-http-3","title":{"rendered":"Chrome ha a\u00f1adido soporte experimental para el protocolo HTTP\\\/3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>En versiones experimentales <noindex><a rel=\"nofollow\" href=\"https:\/\/www.google.com\/chrome\/canary\/\">Chrome Canary<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/programmingart\/status\/1174775953316294658\">se ha a\u00f1adido<\/a><\/noindex> soporte del protocolo HTTP\/3, que implementa una capa para que HTTP funcione sobre el protocolo QUIC. El protocolo QUIC fue a\u00f1adido al navegador hace cinco a\u00f1os y desde entonces se utiliza para optimizar el funcionamiento de los servicios de Google. Sin embargo, la variante del QUIC implementada en Chrome ten\u00eda algunas diferencias respecto a la variante de <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">especificaciones<\/a><\/noindex> IETF, pero ahora las implementaciones est\u00e1n sincronizadas.<\/p>\n<p>HTTP\/3 estandariza el uso de QUIC como transporte para HTTP\/2. Para habilitar HTTP\/3 y la variante de QUIC de <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-quic-transport-23\">la borrador n\u00famero 23<\/a><\/noindex> Las especificaciones de IETF requieren que se inicie Chrome con las opciones &#171;&#8212;enable-quic &#8212;quic-version=h3-23&#187;, despu\u00e9s de lo cual al abrir el sitio de prueba <noindex><a rel=\"nofollow\" href=\"https:\/\/quic.rocks:4433\/\">quic.rocks:4433<\/a><\/noindex> en el modo de inspecci\u00f3n de red en las herramientas para desarrolladores, la actividad de HTTP\/3 aparecer\u00e1 como &#171;http\/2+quic\/99&#187;.<\/p>\n<p>Recordemos que el protocolo <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chromium.org\/quic\/\">QUIC<\/a><\/noindex> (Conexiones R\u00e1pidas de UDP por Internet) ha sido desarrollado por Google desde 2013 como una alternativa a la combinaci\u00f3n TCP+TLS para la web, resolviendo problemas con largos tiempos de establecimiento y negociaci\u00f3n de conexiones en TCP y eliminando retrasos por la p\u00e9rdida de paquetes durante la transmisi\u00f3n de datos. QUIC es una capa sobre el protocolo UDP, que soporta multiplexi\u00f3n de m\u00faltiples conexiones y proporciona m\u00e9todos de cifrado equivalentes a TLS\/SSL. Este protocolo ya est\u00e1 integrado en la infraestructura de servidores de Google, forma parte de Chrome, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48312\">programado<\/a><\/noindex> para su inclusi\u00f3n en Firefox y se utiliza activamente para atender solicitudes de clientes en los servidores de Google. <\/p>\n<p>Principales <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.google.com\/document\/d\/1lmL9EF6qKrk7gbazY8bIdvq3Pno2Xj_l_YShP40GLQE\/preview?sle=true#\">caracter\u00edsticas<\/a><\/noindex> QUIC:\n<\/p>\n<ul>\n<li class=\"l\"> Alta seguridad, similar a TLS (de hecho, QUIC permite el uso de TLS sobre UDP);\n<\/li>\n<li class=\"l\"> Control de integridad del flujo, previniendo la p\u00e9rdida de paquetes;\n<\/li>\n<li class=\"l\"> La posibilidad de establecer una conexi\u00f3n de inmediato (0-RTT, en aproximadamente el 75% de los casos los datos se pueden transmitir inmediatamente despu\u00e9s del env\u00edo del paquete de establecimiento de conexi\u00f3n) y asegurar una latencia m\u00ednima entre el env\u00edo de la solicitud y la recepci\u00f3n de la respuesta (RTT, Round Trip Time);\n<\/li>\n<li class=\"l\"> No utilizar el mismo n\u00famero de secuencia para la retransmisi\u00f3n del paquete, lo que permite evitar ambig\u00fcedades al determinar los paquetes recibidos y eliminar los tiempos de espera;\n<\/li>\n<li class=\"l\"> La p\u00e9rdida de paquetes afecta solo a la entrega de la corriente asociada y no detiene la entrega de datos en las corrientes que se transmiten en paralelo a trav\u00e9s de la conexi\u00f3n actual;\n<\/li>\n<li class=\"l\"> Mecanismos de correcci\u00f3n de errores que minimizan la latencia debido a la retransmisi\u00f3n de paquetes perdidos. Uso de c\u00f3digos especiales de correcci\u00f3n de errores a nivel de paquete para reducir situaciones que requieren la retransmisi\u00f3n de datos de un paquete perdido.\n<\/li>\n<li class=\"l\"> Los l\u00edmites criptogr\u00e1ficos de los bloques est\u00e1n alineados con los l\u00edmites de los paquetes de QUIC, lo que reduce el impacto de la p\u00e9rdida de paquetes en la decodificaci\u00f3n del contenido de paquetes subsiguientes;\n<\/li>\n<li class=\"l\"> Ausencia de problemas de bloqueo de la cola TCP;\n<\/li>\n<li class=\"l\"> Soporte para un identificador de conexi\u00f3n que permite reducir el tiempo de establecimiento de una nueva conexi\u00f3n para clientes m\u00f3viles;\n<\/li>\n<li class=\"l\"> Capacidad de conectar mecanismos avanzados de control de congesti\u00f3n de la conexi\u00f3n;\n<\/li>\n<li class=\"l\"> Uso de t\u00e9cnicas de predicci\u00f3n de ancho de banda en cada direcci\u00f3n para asegurar la intensidad \u00f3ptima de env\u00edo de paquetes, evitando caer en un estado de congesti\u00f3n donde se observa la p\u00e9rdida de paquetes;\n<\/li>\n<li class=\"l\">  Notable <noindex><a rel=\"nofollow\" href=\"http:\/\/web.cs.wpi.edu\/~claypool\/ms\/quic\/quic-thesis.pdf\">aumento<\/a><\/noindex> rendimiento y capacidad de transporte en comparaci\u00f3n con TCP. Para servicios de video como YouTube, la aplicaci\u00f3n de QUIC ha demostrado reducir las operaciones de repetici\u00f3n de b\u00fafer al ver videos en un 30%.\n<\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fuente: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51526\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Chrome Canary \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 HTTP\/3, \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u044e\u0449\u0435\u0433\u043e \u043d\u0430\u0434\u0441\u0442\u0440\u043e\u0439\u043a\u0443 \u0434\u043b\u044f \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u044b HTTP \u043f\u043e\u0432\u0435\u0440\u0445 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 QUIC. \u041d\u0435\u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b QUIC \u0431\u044b\u043b \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440 \u043f\u044f\u0442\u044c \u043b\u0435\u0442 \u043d\u0430\u0437\u0430\u0434 \u0438 \u0441 \u0442\u0435\u0445 \u043f\u043e\u0440 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0441\u0435\u0440\u0432\u0438\u0441\u0430\u043c\u0438 Google. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0432\u0448\u0438\u0439\u0441\u044f \u0432 Chrome \u0432\u0430\u0440\u0438\u0430\u043d\u0442 QUIC \u043e\u0442 Google \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0434\u0435\u0442\u0430\u043b\u044f\u0445 \u043e\u0442\u043b\u0438\u0447\u0430\u043b\u0441\u044f \u043e\u0442 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430 \u0438\u0437 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-38322","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Chrome Canary\" \/>\n\t<meta name=\"robots\" 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