{"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\/da\/blog\/news\/v-nochnyh-i-beta-sborkah-firefox-vklyuchena-po-umolchaniyu-podderzhka-http-3","title":{"rendered":"I nat- og beta-builds af Firefox er underst\u00f8ttelse af HTTP\/3 aktiv som standard","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>I natbuilds af Firefox samt i beta-versionen er underst\u00f8ttelse af HTTP\/3 som standard aktiveret. I den stabile version er aktiveringen af HTTP\/3 planlagt til frigivelsen af Firefox 88, som er sat til den 20. april. I Chrome begyndte selektiv aktivering af HTTP\/3 i oktober 2020.      <\/p>\n<p>Underst\u00f8ttelsen af HTTP\/3 i Firefox er baseret p\u00e5 det projekt, der udvikles af Mozilla, kaldet neqo, som leverer klientimplementeringen og <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3679\">server<\/a> til QUIC-protokollen. Koden til komponenterne, der underst\u00f8tter HTTP\/3 og QUIC, er skrevet i Rust. For at styre aktiveringen af HTTP\/3 er der i about:config en mulighed ved navn &#171;network.http.http3.enabled&#187;. Eksperimentel underst\u00f8ttelse af HTTP\/3 er ogs\u00e5 allerede tilf\u00f8jet i klientsoftware som Chrome og curl, og for  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/\"   title=\"servere\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1559\">servere<\/a> er det tilg\u00e6ngeligt i nginx samt i form af et nginx-modul og en testserver fra Cloudflare. Flere testsider er oprettet for at kontrollere klienternes funktionalitet med HTTP\/3.        <\/p>\n<p>Protokollen HTTP\/3 er stadig i det udkast af specifikation og ikke endeligt standardiseret i IETF. HTTP\/3 definerer brugen af protokollen QUIC som transport for HTTP\/2. Protokollen QUIC (Quick UDP Internet Connections) har v\u00e6ret under udvikling af Google siden 2013 som et alternativ til TCP+TLS for web, som l\u00f8ser problemer med lang ops\u00e6tningstid og forhandlingsproblemer i TCP og eliminerer forsinkelser ved tab af pakker under datatransmission. QUIC er et lag oven p\u00e5 UDP-protokollen, der underst\u00f8tter multiplexing af flere forbindelser og tilbyder krypteringsmetoder svarende til TLS\/SSL. Under udviklingen af IETF-standarden blev der lavet \u00e6ndringer i protokollen, hvilket f\u00f8rte til oprettelsen af to parallelt eksisterende grene; en til HTTP\/3 og den anden st\u00f8ttet af Google (Chrome underst\u00f8tter begge varianter).     <\/p>\n<p>Hovedfunktionerne ved QUIC:  <\/p>\n<ul>\n<li class=\"l\"> H\u00f8j sikkerhed svarende til TLS (faktisk giver QUIC mulighed for brug af TLS oven p\u00e5 UDP);  <\/li>\n<li class=\"l\"> Overv\u00e5gning af str\u00f8mmens integritet, der forhindrer tab af pakker;    <\/li>\n<li class=\"l\"> Mulighed for straks at etablere forbindelse (0-RTT, i ca. 75% af tilf\u00e6ldene kan data overf\u00f8res straks efter sending af forbindelsespakken) og sikre minimale forsinkelser mellem fremsendelse af anmodning og modtagelse af svar (RTT, Round Trip Time);    <\/li>\n<li class=\"l\"> Brug af et andet sekvensnummer ved genoverf\u00f8rsel af pakken, hvilket g\u00f8r det muligt at undg\u00e5 tvetydighed ved bestemmelse af modtagne pakker og eliminere timeouts;  <\/li>\n<li class=\"l\"> Pakketab p\u00e5virker kun leveringen af den tilknyttede str\u00f8m og stopper ikke dataoverf\u00f8rslen i parallelt overf\u00f8rte str\u00f8mme gennem den aktuelle forbindelse;    <\/li>\n<li class=\"l\"> Fejlkorrektionsmidler, der minimerer forsinkelser p\u00e5 grund af genoverf\u00f8rsel af tabte pakker. Brug af specialiserede fejlkorrektionskoder p\u00e5 pakkeniveau for at reducere situationer, der kr\u00e6ver genoverf\u00f8rsel af data fra en tabt pakke.   <\/li>\n<li class=\"l\"> Gr\u00e6nserne for kryptografiske blokke er justeret med gr\u00e6nserne for QUIC-pakker, hvilket reducerer tabspakkernes indvirkning p\u00e5 afkodningen af indholdet i efterf\u00f8lgende pakker;    <\/li>\n<li class=\"l\"> Ingen problemer med TCP-k\u00f8blokering;    <\/li>\n<li class=\"l\"> Underst\u00f8ttelse af forbindelsesidentifikatoren, der reducerer tiden til at etablere en genforbindelse for mobile klienter;  <\/li>\n<li class=\"l\"> Mulighed for at tilslutte udvidede mekanismer til overv\u00e5gning af forbindelsesoverbelastning;  <\/li>\n<li class=\"l\"> Brug af kapacitetsprognoseteknikker i hver retning for at sikre optimal intensitet i pakkeafsendelsen, hvilket forhindrer at glide ind i en overbelastningssituation, hvor pakkemister forekommer;    <\/li>\n<li class=\"l\">  En markant stigning i ydeevne og b\u00e5ndbredde sammenlignet med TCP. For videotjenester som YouTube har anvendelsen af QUIC vist sig at reducere buffering-operationer med 30% under videoafspilning.          <\/li>\n<\/ul>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54801\">opennet.ru<\/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 5.0.3 - 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