{"id":99501,"date":"2021-03-21T10:22:35","date_gmt":"2021-03-21T08:22:35","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-nochnyh-i-beta-sborkah-firefox-vklyuchena-po-umolchaniyu-podderzhka-http-3"},"modified":"2021-03-21T10:22:35","modified_gmt":"2021-03-21T08:22:35","slug":"v-nochnyh-i-beta-sborkah-firefox-vklyuchena-po-umolchaniyu-podderzhka-http-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/v-nochnyh-i-beta-sborkah-firefox-vklyuchena-po-umolchaniyu-podderzhka-http-3","title":{"rendered":"\u00cen versiunile nocturne \u0219i beta ale Firefox, suportul pentru HTTP\/3 este activat \u00een mod implicit","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00cen versiunile nightly ale Firefox, precum \u0219i \u00een versiunea beta, suportul pentru protocolul HTTP\/3 este activat implicit. \u00cen ramura stabil\u0103, activarea HTTP\/3 este planificat\u0103 pentru lansarea Firefox 88, programat\u0103 pentru 20 aprilie. Activarea selectiv\u0103 a HTTP\/3 \u00een Chrome a \u00eenceput \u00een octombrie 2020.      <\/p>\n<p>Suportul pentru HTTP\/3 \u00een Firefox se bazeaz\u0103 pe proiectul neqo dezvoltat de Mozilla, care ofer\u0103 o implementare a clientului \u0219i <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3679\">server<\/a> pentru protocolul QUIC. Codul componentelor pentru suportul HTTP\/3 \u0219i QUIC este scris \u00een Rust. Pentru a gestiona activarea HTTP\/3 \u00een about:config, exist\u0103 op\u021biunea \u201enetwork.http.http3.enabled\u201d. Suportul experimental pentru HTTP\/3 a fost de asemenea ad\u0103ugat deja \u00een Chrome \u0219i curl, iar pentru  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/server\/\"   title=\"servere\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1559\">servere<\/a> este disponibil \u00een nginx, precum \u0219i sub form\u0103 de modul nginx \u0219i server de testare oferit de Cloudflare. Au fost lansate mai multe site-uri de testare pentru a verifica func\u021bionarea clien\u021bilor HTTP\/3.        <\/p>\n<p>Protocolul HTTP\/3 se afl\u0103 \u00eenc\u0103 \u00een stadiul de specifica\u021bie preliminar\u0103 \u0219i nu este complet standardizat \u00een IETF. HTTP\/3 define\u0219te utilizarea protocolului QUIC ca transport pentru HTTP\/2. Protocolul QUIC (Quick UDP Internet Connections) este dezvoltat de Google din 2013 ca o alternativ\u0103 la combina\u021bia TCP+TLS pentru Web, rezolv\u00e2nd problemele legate de timpii mari de stabilire \u0219i negociere a conexiunilor \u00een TCP \u0219i elimin\u00e2nd \u00eent\u00e2rzierile cauzate de pierderile de pachete \u00een timpul transferului de date. QUIC reprezint\u0103 o suprastructur\u0103 asupra protocolului UDP, care suport\u0103 multiplexarea mai multor conexiuni \u0219i ofer\u0103 metode de criptare echivalente cu TLS\/SSL. \u00cen procesul de dezvoltare a standardului IETF, protocolul a suferit modific\u0103ri, ceea ce a condus la apari\u021bia a dou\u0103 ramuri care coexist\u0103, una pentru HTTP\/3 \u0219i cealalt\u0103 sus\u021binut\u0103 de Google (Chrome suport\u0103 ambele variante).     <\/p>\n<p>Caracteristici principale ale QUIC:  <\/p>\n<ul>\n<li class=\"l\"> Securitate \u00eenalt\u0103, similar\u0103 cu TLS (\u00een esen\u021b\u0103, QUIC ofer\u0103 posibilitatea utiliz\u0103rii TLS peste UDP);  <\/li>\n<li class=\"l\"> Controlul integrit\u0103\u021bii fluxului, prevenind pierderea pachetelor;    <\/li>\n<li class=\"l\"> Posibilitatea de a stabili instantaneu o conexiune (0-RTT, \u00een aproximativ 75% din cazuri, datele pot fi transmise imediat dup\u0103 trimiterea pachetului de stabilire a conexiunii) \u0219i de a asigura \u00eent\u00e2rzieri minime \u00eentre trimiterea cererii \u0219i primirea r\u0103spunsului (RTT, Round Trip Time);    <\/li>\n<li class=\"l\"> Utilizarea unui alt num\u0103r de secven\u021b\u0103 pentru retransmisia pachetului, ceea ce permite evitarea ambiguit\u0103\u021bii \u00een determinarea pachetelor primit \u0219i eliminarea timeout-urilor;  <\/li>\n<li class=\"l\"> Pierderea unui pachet afecteaz\u0103 livrarea doar a fluxului asociat \u0219i nu opre\u0219te livrarea datelor \u00een fluxurile transmise \u00een paralel prin conexiunea curent\u0103;    <\/li>\n<li class=\"l\"> Mijloace de corectare a erorilor, care minimizeaz\u0103 \u00eent\u00e2rzierile cauzate de retransmisia pachetelor pierdute. Utilizarea unor coduri speciale de corectare a erorilor la nivel de pachet pentru a reduce situa\u021biile care necesit\u0103 retransmiterea datelor din pachetul pierdut.   <\/li>\n<li class=\"l\"> Limitele blocurilor criptografice sunt aliniate cu limitele pachetelor QUIC, ceea ce reduce impactul pierderilor de pachete asupra decodific\u0103rii con\u021binutului pachetelor urm\u0103toare;    <\/li>\n<li class=\"l\"> Lipsa problemelor cu blocarea cozii TCP;    <\/li>\n<li class=\"l\"> Suport pentru identificatorul de conexiune, care permite reducerea timpului de reinstaurare a conexiunii pentru clien\u021bi mobile;  <\/li>\n<li class=\"l\"> Posibilitatea de a activa mecanisme extinse de control al supra\u00eenc\u0103rc\u0103rii conexiunii;  <\/li>\n<li class=\"l\"> Utilizarea tehnicii de previzionare a capacit\u0103\u021bii de transmisie \u00een fiecare direc\u021bie pentru a asigura o intensitate optim\u0103 a trimiterii pachetelor, prevenind astfel ajungerea \u00eentr-o stare de supra\u00eenc\u0103rcare, \u00een care se observ\u0103 pierderi de pachete;    <\/li>\n<li class=\"l\">  Un cre\u0219tere semnificativ\u0103 a performan\u021bei \u0219i capacit\u0103\u021bii, comparativ cu TCP. Pentru serviciile video, cum ar fi YouTube, utilizarea QUIC a ar\u0103tat o reducere a opera\u021biunilor de rebuffering \u00een timpul red\u0103rii video cu 30%.          <\/li>\n<\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54801\">opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043d\u043e\u0447\u043d\u044b\u0445 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 Firefox, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0432 \u0431\u0435\u0442\u0430-\u0432\u0435\u0440\u0441\u0438\u0438 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 HTTP\/3. \u0412 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 HTTP\/3 \u043d\u0430\u043c\u0435\u0447\u0435\u043d\u043e \u043d\u0430 \u0432\u044b\u043f\u0443\u0441\u043a Firefox 88, \u0437\u0430\u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u043d\u0430 20 \u0430\u043f\u0440\u0435\u043b\u044f. \u0412 Chrome \u0432\u044b\u0431\u043e\u0440\u043e\u0447\u043d\u0430\u044f \u0430\u043a\u0442\u0438\u0432\u0430\u0446\u0438\u044f HTTP\/3 \u043d\u0430\u0447\u0430\u043b\u0430\u0441\u044c \u0432 \u043e\u043a\u0442\u044f\u0431\u0440\u0435 2020 \u0433\u043e\u0434\u0430. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 HTTP\/3 \u0432 Firefox \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Mozilla \u043f\u0440\u043e\u0435\u043a\u0442\u0435 neqo, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f [&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-99501","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043d\u043e\u0447\u043d\u044b\u0445 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 Firefox, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0432 \u0431\u0435\u0442\u0430-\u0432\u0435\u0440\u0441\u0438\u0438 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e 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