{"id":294,"date":"2020-11-29T19:02:27","date_gmt":"2020-11-30T00:02:27","guid":{"rendered":"https:\/\/www.alpharithms.com\/?post_type=term&#038;p=294"},"modified":"2021-07-27T08:08:33","modified_gmt":"2021-07-27T12:08:33","slug":"protocol-data-unit-pdu","status":"publish","type":"post","link":"https:\/\/www.alpharithms.com\/protocol-data-unit-pdu-270219\/","title":{"rendered":"Protocol Data Unit (PDU)"},"content":{"rendered":"<p class=\"ae-first\">In computer networking, the Protocol Data Unit (PDU) is a single unit of packaged data transferred between network end systems. In a\u00a0<a href=\"https:\/\/www.alpharithms.com\/network-protocol-layers-432211\/\">layered network protocol\u00a0stack<\/a>, the PDU varies based on layer-specific constraints and convention.<\/p>\n<p>For example, data packets are referred to as\u00a0<em>segments<\/em>\u00a0during TCP transmission on the transport layer,\u00a0<em>datagrams<\/em>\u00a0during UDP transmission,\u00a0<em>frames<\/em>\u00a0on the link layer, and again sometimes\u00a0<em>datagrams<\/em>\u00a0on the network layer irrespective of the upper-layer protocol.<\/p>\n<p>A PDU represents data that has been received from an upper network layer and encapsulated with required lower layer header information. This data has been prepared for transmission to the next, lower, network layer. PDUs are comparable to\u00a0<a href=\"https:\/\/www.alpharithms.com\/term\/service-data-unit-sdu\/\"><em>service<\/em>\u00a0data units (SDUs)<\/a>\u00a0but SDUs have not yet been encapsulated for lower-layer transmission.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In computer networking, the Protocol Data Unit (PDU) is a single unit of packaged data transferred between network end systems. In a\u00a0layered network protocol\u00a0stack, the PDU varies based on layer-specific constraints and convention. For example, data packets are referred to as\u00a0segments\u00a0during TCP transmission on the transport layer,\u00a0datagrams\u00a0during UDP transmission,\u00a0frames\u00a0on the link layer, and again sometimes\u00a0datagrams\u00a0on [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2472,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[3,260],"tags":[461,82,134],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/posts\/294"}],"collection":[{"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/comments?post=294"}],"version-history":[{"count":1,"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/posts\/294\/revisions"}],"predecessor-version":[{"id":295,"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/posts\/294\/revisions\/295"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/media\/2472"}],"wp:attachment":[{"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/media?parent=294"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/categories?post=294"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpharithms.com\/wp-json\/wp\/v2\/tags?post=294"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}