{"id":1225,"date":"2012-11-19T12:49:17","date_gmt":"2012-11-19T14:49:17","guid":{"rendered":"http:\/\/efagundes.com\/openclass_networking\/?page_id=1225"},"modified":"2022-01-16T17:52:39","modified_gmt":"2022-01-16T20:52:39","slug":"cifras-de-transposicao","status":"publish","type":"page","link":"https:\/\/efagundes.com\/networking\/seguranca-de-redes\/cifras-de-transposicao\/","title":{"rendered":"Cifras de transposi\u00e7\u00e3o"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide261.png\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2700\" data-permalink=\"https:\/\/efagundes.com\/networking\/seguranca-de-redes\/cifras-de-transposicao\/slide261\/\" data-orig-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide261.png?fit=960%2C720&amp;ssl=1\" data-orig-size=\"960,720\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Slide261\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide261.png?fit=960%2C720&amp;ssl=1\" class=\"alignnone size-full wp-image-2700\" src=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide261.png?resize=960%2C720\" alt=\"Slide261\" width=\"960\" height=\"720\" srcset=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide261.png?w=960&amp;ssl=1 960w, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide261.png?resize=300%2C225&amp;ssl=1 300w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":1205,"menu_order":274,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-1225","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P8yKGp-jL","jetpack-related-posts":[{"id":1221,"url":"https:\/\/efagundes.com\/networking\/seguranca-de-redes\/cifras-de-substituicao\/","url_meta":{"origin":1225,"position":0},"title":"Cifras de Substitui\u00e7\u00e3o","author":"Eduardo Fagundes","date":"19\/11\/2012","format":false,"excerpt":"","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide260","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide260.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide260.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide260.png?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide260.png?resize=700%2C400 2x"},"classes":[]},{"id":572,"url":"https:\/\/efagundes.com\/networking\/camada-de-enlace-de-dados\/servicos-oferecidos-a-camada-de-rede\/","url_meta":{"origin":1225,"position":1},"title":"Servi\u00e7os oferecidos \u00e0 camada de rede","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"A fun\u00e7\u00e3o da camada de enlace de dados \u00e9 fornece servi\u00e7os \u00e0 camada de rede. O principal servi\u00e7o \u00e9 transferir dados da camada de rede da m\u00e1quina de origem para a camada de rede da m\u00e1quina de destino. Na camada de rede da m\u00e1quina de origem, h\u00e1 uma entidade chamada\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide310.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide310.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide310.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide310.jpg?resize=700%2C400 2x"},"classes":[]},{"id":570,"url":"https:\/\/efagundes.com\/networking\/camada-de-enlace-de-dados\/a-camada-de-enlace-de-dados\/","url_meta":{"origin":1225,"position":2},"title":"A camada de enlace de dados","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"O problema b\u00e1sico que esta camada deve resolver \u00e9 a de prover uma linha de comunica\u00e7\u00e3o entre dois nodos que necessitam trocar informa\u00e7\u00f5es entre si. Estes nodos podem tanto ser elementos integrantes de uma rede, como apenas dois elementos de computa\u00e7\u00e3o que se comunicam. A linha f\u00edsica de transmiss\u00e3o que\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/efagundes.com.br\/networking\/wp-content\/uploads\/sites\/7\/2012\/11\/Slide217.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com.br\/networking\/wp-content\/uploads\/sites\/7\/2012\/11\/Slide217.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com.br\/networking\/wp-content\/uploads\/sites\/7\/2012\/11\/Slide217.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":422,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/tipos-de-modulacao-iii\/","url_meta":{"origin":1225,"position":3},"title":"Tipos de modula\u00e7\u00e3o (III)","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"Os conceitos de largura de banda, baud, s\u00edmbolo e taxa de bits costuma ser confundidos: Largura de banda de um meio \u00e9 a faixa de freq\u00fc\u00eancias que passam por ele com atenua\u00e7\u00e3o m\u00ednima. \u00c9 uma propriedade f\u00edsica do meio (normalmente, variando de 0 at\u00e9 alguma freq\u00fc\u00eancia m\u00e1xima definida pelo meio)\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide14","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=700%2C400 2x"},"classes":[]},{"id":578,"url":"https:\/\/efagundes.com\/networking\/camada-de-enlace-de-dados\/enquadramento-bytes-de-flags-com-insercao-de-bytes\/","url_meta":{"origin":1225,"position":4},"title":"Enquadramento: bytes de flags com inser\u00e7\u00e3o de bytes","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"Esse m\u00e9todo contorna o problema de ressincroniza\u00e7\u00e3o ap\u00f3s um erro, fazendo cada quadro come\u00e7ar e terminar com bytes especiais. No passado, os bytes iniciais e finais eram diferentes mas, nos \u00faltimos anos, a maioria dos protocolos tem utilizado o mesmo byte, chamado byte de flag, como delimitador de in\u00edcio e\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide66.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide66.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide66.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide66.jpg?resize=700%2C400 2x"},"classes":[]},{"id":597,"url":"https:\/\/efagundes.com\/networking\/protocolos-elementares-de-enlace-de-dados\/um-protocolo-de-janela-deslizante-de-um-bit\/","url_meta":{"origin":1225,"position":5},"title":"Um protocolo de janela deslizante de um bit","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"A figura mostra a sequ\u00eancia de dados, confirma\u00e7\u00e3o e n\u00famero dos pacotes da janela deslizante de tamanho 1 e seq\u00fc\u00eancia variando de 0 a 1. Ademais, o protocolo \u00e9 bidirecional para transmiss\u00e3o de dados e usa a t\u00e9cnica de carona para a confirma\u00e7\u00e3o. A t\u00e9cnica de carona permite a transmiss\u00e3o\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide155.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide155.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide155.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide155.jpg?resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/1225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/comments?post=1225"}],"version-history":[{"count":0,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/1225\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/1205"}],"wp:attachment":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/media?parent=1225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}