{"id":184,"date":"2012-11-16T21:21:41","date_gmt":"2012-11-16T23:21:41","guid":{"rendered":"http:\/\/efagundes.com\/openclass_networking\/?page_id=184"},"modified":"2022-01-16T17:50:05","modified_gmt":"2022-01-16T20:50:05","slug":"lans-sem-fio-802-11","status":"publish","type":"page","link":"https:\/\/efagundes.com\/networking\/redes-locais\/lans-sem-fio-802-11\/","title":{"rendered":"LANs sem fio: 802.11"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide191.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2373\" data-permalink=\"https:\/\/efagundes.com\/networking\/redes-locais\/ethernet\/slide19-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide191.jpg?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=\"Slide19\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide191.jpg?fit=960%2C720&amp;ssl=1\" class=\"alignnone size-full wp-image-2373\" src=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide191.jpg?resize=960%2C720\" alt=\"Slide19\" width=\"960\" height=\"720\" srcset=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide191.jpg?w=960&amp;ssl=1 960w, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide191.jpg?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":180,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-184","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P8yKGp-2Y","jetpack-related-posts":[{"id":657,"url":"https:\/\/efagundes.com\/networking\/lans-sem-fio\/802-11-estrutura-do-quadro\/","url_meta":{"origin":184,"position":0},"title":"802.11 estrutura do quadro","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide182","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide182.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide182.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide182.png?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide182.png?resize=700%2C400 2x"},"classes":[]},{"id":648,"url":"https:\/\/efagundes.com\/networking\/lans-sem-fio\/802-11-a-pilha-de-protocolos\/","url_meta":{"origin":184,"position":1},"title":"802.11: a pilha de protocolos","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"Os protocolos usados por todas as variantes do 802, inclusive a Ethernet, t\u00eam certas caracter\u00edstica comuns em sua estrutura. Uma vis\u00e3o parcial da pilha de protocolos 802.11 \u00e9 a mostrada na figura acima. A camada f\u00edsica corresponde muito bem \u00e0 camada f\u00edsica do modelo OSI, mas a camada de enlace\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide178","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide178.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide178.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide178.png?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide178.png?resize=700%2C400 2x"},"classes":[]},{"id":659,"url":"https:\/\/efagundes.com\/networking\/lans-sem-fio\/arquitetura-das-lans-sem-fio\/","url_meta":{"origin":184,"position":2},"title":"Arquitetura das LANs sem fio","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"","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\/Slide421.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide421.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide421.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide421.jpg?resize=700%2C400 2x"},"classes":[]},{"id":646,"url":"https:\/\/efagundes.com\/networking\/lans-sem-fio\/","url_meta":{"origin":184,"position":3},"title":"LANs sem fio","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"T\u00f3picos do capitulo","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\/Slide361.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide361.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide361.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide361.jpg?resize=700%2C400 2x"},"classes":[]},{"id":671,"url":"https:\/\/efagundes.com\/networking\/lans-sem-fio\/aplicacoes-do-bluetooth\/","url_meta":{"origin":184,"position":4},"title":"Aplica\u00e7\u00f5es do Bluetooth","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"A maioria dos protocolos de rede s\u00f3 fornece canais entre entidades que se comunicam, deixando para os projetistas de aplica\u00e7\u00f5es a tarefa de descobrir a utilidade desses canis. Em contraste, a especifica\u00e7\u00e3o Bluetooth V1.1 identifica 13 aplica\u00e7\u00f5es espec\u00edficas que ser\u00e3o admitidas e fornece diferentes pilhas de protocolos para cada uma.\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\/Slide47.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide47.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide47.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide47.jpg?resize=700%2C400 2x"},"classes":[]},{"id":1086,"url":"https:\/\/efagundes.com\/networking\/lans-sem-fio\/802-11-o-protocolo-da-subcamada-mac-2-2\/","url_meta":{"origin":184,"position":5},"title":"802.11: o protocolo da subcamada MAC (II)","author":"Eduardo Fagundes","date":"19\/11\/2012","format":false,"excerpt":"\u00a0 A taxa de erro de transmiss\u00e3o em Redes sem Fio \u00e9 geralmente muito maior que em redes de fibra \u00f3ptica, por exemplo. Uma maneira de diminuir a probabilidade de erro dos quadros \u00e9 utilizar quadros pequenos. 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