{"id":5430,"date":"2025-08-16T00:00:00","date_gmt":"2025-08-16T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/"},"modified":"2026-06-22T09:08:51","modified_gmt":"2026-06-22T09:08:51","slug":"ieee-802-3-ethernet-standard-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/pt\/knowledge-center\/ieee-802-3-ethernet-standard-explained","title":{"rendered":"Padr\u00e3o Ethernet IEEE 802.3 Explicado \u2013 Papel, Aplica\u00e7\u00f5es e Conformidade do Produto LINK-PP"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6d9d849b02c74d56827b46e71f2b405a.webp\" alt=\"IEEE 802.3 compliance,IEEE 802.3af, 802.3at, 802.3bt\" class=\"wp-image-5428\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6d9d849b02c74d56827b46e71f2b405a.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6d9d849b02c74d56827b46e71f2b405a-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6d9d849b02c74d56827b46e71f2b405a-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6d9d849b02c74d56827b46e71f2b405a-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6d9d849b02c74d56827b46e71f2b405a-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 Introdu\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Instituto de Engenheiros El\u00e9tricos e Eletr\u00f4nicos (IEEE)<\/strong> \u00e9 um l\u00edder global no desenvolvimento de normas t\u00e9cnicas que moldam a tecnologia moderna. Entre suas muitas contribui\u00e7\u00f5es, <strong>IEEE 802.3<\/strong> destaca-se como a norma definitiva para Ethernet \u2014 a espinha dorsal das redes com fio. Ela define as camadas f\u00edsica e de enlace de dados do modelo OSI, garantindo interoperabilidade, confiabilidade e escalabilidade para dispositivos em todo o mundo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 O que \u00e9 o IEEE 802.3?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Introduzido pela primeira vez em 1983, o IEEE 802.3 especifica as regras para comunica\u00e7\u00e3o Ethernet, abrangendo aspectos como:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Especifica\u00e7\u00f5es da Camada F\u00edsica<\/strong> \u2013 tipos de cabo, codifica\u00e7\u00e3o de sinal e velocidades de transmiss\u00e3o<\/p><\/li>\n\n\n\n<li><p><strong>Protocolos da Camada de Enlace de Dados<\/strong> \u2013 estrutura\u00e7\u00e3o de quadros, endere\u00e7amento e detec\u00e7\u00e3o de erros<\/p><\/li>\n\n\n\n<li><p><strong>Controle de Acesso ao Meio (<\/strong><a href=\"https:\/\/resourceslp.szlogic.cn\/pt\/knowledge-center\/what-are-ethernet-mac-and-phy\/\" target=\"_blank\" rel=\"\"><strong>MAC<\/strong><\/a><strong>)<\/strong> \u2013 usando Acesso M\u00faltiplo por Detec\u00e7\u00e3o de Portadora com Detec\u00e7\u00e3o de Colis\u00e3o (CSMA\/CD)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ao longo do tempo, o IEEE 802.3 evoluiu para incluir taxas de dados mais altas (<strong>10 Mbps a 400 Gbps<\/strong>, com trabalhos em andamento para 800 Gbps), suporte a fibras \u00f3pticas e <strong>Alimenta\u00e7\u00e3o sobre Ethernet (PoE)<\/strong> capacidades.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 Por que o IEEE 802.3 \u00e9 importante<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Compatibilidade Universal<\/strong> \u2013 Garante que equipamentos de rede de diferentes fabricantes funcionem em conjunto.<\/p><\/li>\n\n\n\n<li><p><strong>Escalabilidade de Velocidade<\/strong> \u2013 Abrange uma ampla faixa de taxas de dados, desde <strong>10 Mbps (10BASE-T)<\/strong> and <strong>100 Mbps (Ethernet R\u00e1pida)<\/strong> to <strong>1 Gbps, 10 Gbps<\/strong>, at\u00e9 <strong>400 Gbps<\/strong>.<\/p><\/li>\n\n\n\n<li><p><strong>Inova\u00e7\u00e3o Tecnol\u00f3gica<\/strong> \u2013 Inclui avan\u00e7os em cabeamento, <a href=\"https:\/\/resourceslp.szlogic.cn\/pt\/glossary\/what-you-need-to-know-about-power-over-ethernet\/\" target=\"_blank\" rel=\"\">PoE<\/a> entrega de energia e efici\u00eancia energ\u00e9tica (IEEE 802.3az).<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 Estrutura T\u00e9cnica do IEEE 802.3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">MAC e Formato de Quadro<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Quadros Ethernet padr\u00e3o possuem um <strong>comprimento m\u00ednimo de 64 bytes<\/strong> e uma <strong>m\u00e1ximo de 1518 bytes sem etiquetas VLAN<\/strong>.<\/p><\/li>\n\n\n\n<li><p>Com a marca\u00e7\u00e3o VLAN IEEE 802.1Q, o tamanho m\u00e1ximo do quadro aumenta para <strong>1522 bytes<\/strong>.<\/p><\/li>\n\n\n\n<li><p><em>Quadros Gigantes<\/em> (&gt;9000 bytes) s\u00e3o espec\u00edficos do fornecedor e n\u00e3o fazem parte da norma principal IEEE 802.3.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Controle de Acesso ao Meio<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>As primeiras vers\u00f5es de Ethernet usavam CSMA\/CD para meios compartilhados.<\/p><\/li>\n\n\n\n<li><p>A Ethernet moderna \u00e9 predominantemente full-duplex, baseada em switches e livre de colis\u00f5es.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Variantes da Camada F\u00edsica<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Par tran\u00e7ado de cobre<\/strong>: 10BASE-T, 100BASE-TX, 1000BASE-T, at\u00e9 10GBASE-T<\/p><\/li>\n\n\n\n<li><p><strong>Fibra \u00f3ptica<\/strong>: multimodo e monomodo (ex.: 10GBASE-SR\/LR, 100GBASE-LR4)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Normas PoE<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>3af (PoE)<\/strong> \u2013 Sa\u00edda do PSE at\u00e9 <strong>15,4 W<\/strong> (PD recebe ~12,95 W)<\/p><\/li>\n\n\n\n<li><p><strong>3at (PoE+)<\/strong> \u2013 Sa\u00edda do PSE at\u00e9 <strong>30 W<\/strong> (PD recebe ~25,5 W)<\/p><\/li>\n\n\n\n<li><p><strong>3bt (PoE++)<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li><p><em>Tipo 3<\/em>: Sa\u00edda do PSE at\u00e9 <strong>60 W<\/strong> (PD recebe ~51 W)<\/p><\/li>\n\n\n\n<li><p><em>Tipo 4<\/em>: Sa\u00edda do PSE at\u00e9 <strong>90 W<\/strong> (PD recebe ~71 W)<\/p><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ethernet Eficiente em Energia (EEE)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>IEEE <strong>3az<\/strong> (2010) reduz o consumo de energia durante per\u00edodos de baixa atividade de dados, sem alterar a interface Ethernet.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 Evolu\u00e7\u00e3o do IEEE 802.3 \u2013 Resumo<\/h2>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 179px;\"\/><col style=\"width: 157px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>Padr\u00e3o<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>Ano<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Caracter\u00edstica Not\u00e1vel<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>10BASE-T<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>Anos 1990<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ethernet em cobre a 10 Mbps<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>Ethernet R\u00e1pida<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>1995<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>100 Mbps<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>1000BASE-T<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>1999<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gigabit em cobre<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>10GBASE-T<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>2006<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10 Gbps em cobre<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>2,5\/5GBASE-T<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>2016<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Velocidades intermedi\u00e1rias sobre Cat5e\/Cat6<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>40\/100GBASE<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>2010+<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ethernet de alta velocidade em fibra para data centers<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>200\/400GBASE<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>2018<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ethernet de ultra-alta velocidade<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>PoE\/PoE+\/PoE++<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>2003\u20132018<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Entrega de energia via Ethernet<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"179\"><p>EEE (802.3az)<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"157\"><p>2010<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Economia de energia em estado ocioso<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 LINK-PP e IEEE 802.3: Total Conformidade<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">At <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\">LINK-PP<\/a>, todos os conectores RJ45 PoE e transformadores LAN passam por controle de qualidade rigoroso para garantir <strong>total conformidade com o IEEE 802.3<\/strong>, incluindo ader\u00eancia precisa ao formato de quadro, temporiza\u00e7\u00e3o e especifica\u00e7\u00f5es de entrega de energia PoE.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"608\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ed04ce8541e344ee8501d7be8271ee87-1024x608.webp\" alt=\"LINK-PP &amp; IEEE 802.3: Full Compatibility\" class=\"wp-image-5429\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ed04ce8541e344ee8501d7be8271ee87-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ed04ce8541e344ee8501d7be8271ee87-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ed04ce8541e344ee8501d7be8271ee87-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ed04ce8541e344ee8501d7be8271ee87-18x12.webp 18w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ed04ce8541e344ee8501d7be8271ee87.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">conectores RJ45 PoE<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Exemplos: <a href=\"https:\/\/www.link-pp.com\/products\/2611.html\" target=\"_blank\" rel=\"\">LPJG4928HENL<\/a><\/p><\/li>\n\n\n\n<li><p>Certificado para <strong>10\/100\/1000 Mbps<\/strong><\/p><\/li>\n\n\n\n<li><p>Atende \u00e0s <strong>especifica\u00e7\u00f5es el\u00e9tricas IEEE 802.3at PoE+<\/strong> .<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">RJ45 Integrado com Magn\u00e9ticos e Transformadores LAN<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Combina magn\u00e9ticos de sinal e filtragem LAN em um \u00fanico formato compacto.<\/p><\/li>\n\n\n\n<li><p>Suporta <strong>10 Mbps \u2013 10 Gbps<\/strong>, PoE, controle de EMI e <strong>faixa operacional de -40 \u00b0C a +85 \u00b0C<\/strong> .<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 <strong>Conclus\u00e3o<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>padr\u00e3o IEEE 802.3<\/strong> sustenta a infraestrutura de redes Ethernet, possibilitando interoperabilidade e escalabilidade globais. Ao seguir rigorosamente as especifica\u00e7\u00f5es IEEE \u2014 incluindo entrega precisa de energia PoE e formatos de quadro \u2014 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>LINK-PP<\/strong><\/a> fornece componentes prontos para atender tanto \u00e0s demandas atuais quanto \u00e0s futuras de redes.<\/p>","protected":false},"excerpt":{"rendered":"<p>Saiba mais sobre o padr\u00e3o Ethernet IEEE 802.3, seu papel na comunica\u00e7\u00e3o de rede e como os magn\u00e9ticos PoE da LINK-PP est\u00e3o em conformidade com esse referencial global.<\/p>","protected":false},"author":1,"featured_media":5428,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22,23],"class_list":["post-5430","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors","tag-link-pp-lan-transformers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/comments?post=5430"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5430\/revisions"}],"predecessor-version":[{"id":11393,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5430\/revisions\/11393"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media\/5428"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media?parent=5430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/categories?post=5430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/tags?post=5430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}