{"id":3929,"date":"2019-10-25T10:12:58","date_gmt":"2019-10-25T10:12:58","guid":{"rendered":"https:\/\/assoprovider.it\/?p=3929"},"modified":"2019-10-25T10:12:58","modified_gmt":"2019-10-25T10:12:58","slug":"chi-e-paul-mockapetris","status":"publish","type":"post","link":"https:\/\/assoprovider.it\/es\/chi-e-paul-mockapetris\/","title":{"rendered":"\u00bfQui\u00e9n es Paul Mockapetris, inventor del DNS (la \"gu\u00eda\" de Internet)?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">\u00ab<\/span><i><span style=\"font-weight: 400;\">Cuando env\u00edas una <\/span><\/i><a href=\"https:\/\/assoprovider.it\/es\/storia-ray-tomlinson-inventore-email\/\" target=\"_blank\" rel=\"noopener noreferrer\"><i><span style=\"font-weight: 400;\">correo electr\u00f3nico<\/span><\/i><\/a><i><span style=\"font-weight: 400;\">, esperas que el sistema sepa c\u00f3mo llevarla a donde debe llegar &#8211; es decir, a uno de los 200 millones de dominios &#8211; y en definitiva, funciona<\/span><\/i><span style=\"font-weight: 400;\">\u00bb.<\/span><\/p>\n<p><strong>Con esta frase, <a href=\"https:\/\/internethalloffame.org\/inductees\/paul-mockapetris\" target=\"_blank\" rel=\"noopener noreferrer\">Paul Mockapetris<\/a><\/strong><span style=\"font-weight: 400;\"><strong> El Domain Name System, o DNS, es crucial porque act\u00faa como una gu\u00eda telef\u00f3nica de Internet. Traduce los nombres de dominio comprensibles para los humanos, como www.ejemplo.com, en direcciones IP num\u00e9ricas que las computadoras utilizan para identificar y comunicarse entre s\u00ed. Sin el DNS, tendr\u00edamos que recordar largas secuencias de n\u00fameros para visitar sitios web, lo que har\u00eda la navegaci\u00f3n en Internet mucho m\u00e1s complicada.<\/strong>, ideado por \u00e9l en los a\u00f1os '80 que a\u00fan hoy nos ayuda a conectar entre s\u00ed computadoras y otros dispositivos en todo el mundo.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Sin el DNS, Internet no habr\u00eda tenido la posibilidad de expandirse a los niveles que ha alcanzado hoy. Descubramos m\u00e1s en detalle qu\u00e9 es y c\u00f3mo Mockapetris y sus socios tuvieron la intuici\u00f3n correcta para idearlo.<\/span><\/p>\n<h2><b>\u00bfQu\u00e9 es el DNS?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Como hemos mencionado, <strong>el DNS es el \"sistema de nombres de dominio\", del ingl\u00e9s Domain Name System<\/strong>: <\/span><strong><a href=\"https:\/\/aws.amazon.com\/it\/route53\/what-is-dns\/\" target=\"_blank\" rel=\"noopener noreferrer\">traducir<\/a><\/strong><span style=\"font-weight: 400;\"><strong> es decir, las direcciones de internet<\/strong> a los que estamos acostumbrados (como <\/span><a href=\"https:\/\/assoprovider.it\/es\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400;\">www.assoprovider.it<\/span><\/a><span style=\"font-weight: 400;\">) <strong>en las direcciones IP<\/strong> (Internet Protocol) utilizados por computadoras y otros dispositivos como tel\u00e9fonos inteligentes y tabletas. Una direcci\u00f3n IP est\u00e1 compuesta por una cadena de n\u00fameros, como 192.168.1.1. Este nombre \"en c\u00f3digo\" sirve para que los diferentes dispositivos en l\u00ednea se conecten y comuniquen entre s\u00ed.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Sin el DNS, en esencia, deber\u00edamos cada vez introducir (y recordar sobre todo) esa cadena de n\u00fameros para acceder a un sitio web o contactar a alguien en l\u00ednea.<\/strong>\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Es un poco como una gu\u00eda telef\u00f3nica: probablemente recordamos un peque\u00f1o porcentaje de los n\u00fameros de tel\u00e9fono que tenemos en la gu\u00eda y sin una correspondencia entre los nombres de amigos y familiares y sus contactos tendr\u00edamos una enorme dificultad para llamarlos. <strong>Los servidores DNS gestionan precisamente este aspecto, mapeando nombres (de dominio) y n\u00fameros (de direcci\u00f3n IP) y correlacion\u00e1ndolos entre s\u00ed.<\/strong><\/span><\/p>\n<h2><b>Internet antes del DNS<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">En este punto, surge espont\u00e1neamente una pregunta: <strong>\u00bfC\u00f3mo se comunicaban antes las computadoras entre s\u00ed?<\/strong> <strong>A principios de los a\u00f1os '80 todav\u00eda exist\u00eda ARPAnet<\/strong>, la red gubernamental progenitora de Internet, y <strong>para tener una \"direcci\u00f3n\" (o mejor un <\/strong><\/span><strong><i>nombre de host<\/i>) con el que comunicarte deb\u00edas <a href=\"https:\/\/internethalloffame.org\/blog\/2012\/07\/23\/why-does-net-still-work-christmas-paul-mockapetris\" target=\"_blank\" rel=\"noopener noreferrer\">llamar<\/a><\/strong><span style=\"font-weight: 400;\"><strong> el NIC, Network Information Center<\/strong>, presente en el instituto de investigaci\u00f3n de la Universidad de Stanford en California. Que obviamente no estaba abierto 24 horas, sino solo cuando el personal estaba en la oficina: por lo tanto, no m\u00e1s tarde de las 18 (Hora del Pac\u00edfico) y nunca durante los d\u00edas festivos.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Como explica el mismo Mockapetris:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00ab<\/span><i><span style=\"font-weight: 400;\">Si quer\u00edas agregar una m\u00e1quina a la red, deb\u00edas llamar a Stanford y hablar con el Network Information Center, para recibir un nombre y una direcci\u00f3n<\/span><\/i><span style=\"font-weight: 400;\">\u00bb.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><strong>El NIC pose\u00eda un \u00fanico archivo de texto<\/strong>, denominado \"host.text\", en el que se anotan todas las direcciones de la red ARPA, con las correspondientes correspondencias a las m\u00e1quinas conectadas. <strong>Una especie de p\u00e1ginas blancas de los inicios de la Red<\/strong>. El archivo luego se distribu\u00eda a todas las m\u00e1quinas de la red para permitir que todos se comunicaran.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Los problemas de este sistema son dos.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">El primero es que para contactar con otro ordenador debes buscar su direcci\u00f3n en tu agenda y luego teclear los n\u00fameros en el teclado. El segundo es que cada d\u00eda es necesario <\/span><a href=\"https:\/\/www.wired.com\/2011\/06\/0623dns-domain-name-system-tested\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-weight: 400;\">copiar<\/span><\/a><span style=\"font-weight: 400;\"> \"a mano\" todas las nuevas direcciones insertadas en la red.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Las personas que trabajan en ARPAnet son plenamente conscientes del problema. <strong>Jon Postel, a capo del dipartimento di ricerca della Southern California University (USC)<\/strong> que trabaj\u00f3 en el primer mensaje de la historia enviado a trav\u00e9s de la red, <strong>un d\u00eda convoca a Mockapetris en su oficina<\/strong>, para hablarle del problema. <strong>Quiere que Mockapetris encuentre una soluci\u00f3n<\/strong> y le propone cinco posibles caminos diferentes a seguir. El investigador acepta el trabajo, pero ignora todas las indicaciones de Postel.<\/span><\/p>\n<h2><b>La intuici\u00f3n de Paul Mockapetris<\/b><\/h2>\n<p><span style=\"font-weight: 400;\"><strong>Mockapetris entiende que <\/strong>el sistema centralizado del NIC est\u00e1 ya obsoleto: <strong>es necesario crear una red distribuida en varios servidores, en diferentes localidades<\/strong>, para obtener el resultado esperado.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Este es el primer paso: desde ese momento, quien quiera comunicarse en la red no tiene que esperar necesariamente los horarios de apertura de Stanford, sino que tiene mayor flexibilidad.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><strong>El sistema asegura luego que cada dispositivo en la red tenga su \"identidad\"<\/strong>, un nombre de dominio f\u00e1cilmente identificable y memorizable, que luego se traduce en una direcci\u00f3n IP hacia la cual se enrutan los paquetes de datos enviados desde otra computadora.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00ab<\/span><i><span style=\"font-weight: 400;\">Para hacer cualquier cosa en Internet <\/span><\/i><span style=\"font-weight: 400;\">&#8211; explica Mockapetris &#8211;<\/span><i><span style=\"font-weight: 400;\"> debes ser capaz de decirle a las personas qui\u00e9n eres: el DNS hace precisamente esto. Adem\u00e1s, te permite consultar a cualquiera que haya introducido sus datos en el DNS<\/span><\/i><span style=\"font-weight: 400;\">\u00bb.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">En esencia, el sistema ideado por el investigador permite a todos los miembros de la red insertar y cambiar de manera aut\u00f3noma sus propios par\u00e1metros, asegurando que esos datos sean visibles para cualquiera.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">En 1983 el nuevo sistema est\u00e1 listo. <strong>Despu\u00e9s de una fase de prueba de algunos meses, Mockapetris, Post y Craig Partridge, otro de los pioneros que trabaj\u00f3 en el DNS, publican la idea en un memorando para el Request for Comments (RFC), en noviembre de 1983.\u00a0<\/strong><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Casi un a\u00f1o despu\u00e9s, <strong>en octubre de 1984, se establecen oficialmente los primeros dominios gen\u00e9ricos, que a\u00fan hoy todos conocemos y usamos<\/strong>: .com, .edu, .gov, .mil, .net e .org. <strong>En 1986, el DNS se convierte en uno de los est\u00e1ndares originales de Internet<\/strong>, establecidos por la IETF, el Grupo de Trabajo que sent\u00f3 las bases para la red que todos conocemos hoy.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La primera actualizaci\u00f3n del DNS lleg\u00f3 tres a\u00f1os despu\u00e9s de la creaci\u00f3n y aunque el sistema ha evolucionado mucho a lo largo de las d\u00e9cadas, todav\u00eda hoy permite a millones de personas comunicarse entre s\u00ed.<\/span><\/p>\n<p><b>Lee tambi\u00e9n: <\/b><a href=\"https:\/\/assoprovider.it\/es\/gli-inventori-del-protocollo-tcpip-la-storia-dellincontro-tra-vint-cerf-e-robert-kahn\/\" target=\"_blank\" rel=\"noopener noreferrer\"><b>Los inventores del protocolo TCP\/IP, la historia del encuentro entre Vint Cerf y Robert Kahn<\/b><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u00abQuando invii una email, ti aspetti che il sistema sappia come portarla dove deve arrivare &#8211; cio\u00e8 a uno dei 200 milioni di domini &#8211; e tutto sommato, funziona\u00bb. Con questa frase, Paul Mockapetris spiega in maniera molto semplice l\u2019importanza del Domain Name System, o DNS, da lui ideato negli anni \u201880 che ancora oggi [&hellip;]<\/p>\n","protected":false},"author":439,"featured_media":3932,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[497,496,485],"tags":[],"class_list":["post-3929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-focus-on","category-la-storia-2","category-pionieri-della-rete"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Chi \u00e8 Paul Mockapetris - inventore del DNS (la &quot;rubrica&quot; di internet)<\/title>\n<meta name=\"description\" content=\"Senza il DNS, Internet non sarebbe quello che \u00e8 oggi. 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