Talk:Protocol data unit: Difference between revisions

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==Diagrams==

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{{WikiProject Computing |importance=Low |network=yes |network-importance=Low}}

Some diagrams might make this article more accessible. In networking books they usually show different layers and how a PDU goes on each one. [[User:Gravix|Gravix]] 01:05, 1 September 2007 (UTC)

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== No word "datagram" found in article==

{{merged-from|MAC protocol data unit|date=2012-04-05}}

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What is a [[datagram]]? [[User:Mathiastck|Mathiastck]] 22:49, 9 August 2006 (UTC)

: It's related to "packet". [[User:Logictheo|Logictheo]] 09:35, 3 October 2006 (UTC)

[[Fragments]] - click. Relevancy? --[[User:165.173.14.76|165.173.14.76]] 00:51, 14 December 2006 (UTC)

== "Segments" redirection ==

The "segments" link goes to a disambiguation page, the relevant link on which redirects to this page. [[User:67.185.99.246|67.185.99.246]] 19:16, 29 January 2007 (UTC)

:That now goes to [[TCP segment]] instead. ~[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 19:22, 3 April 2020 (UTC)

== ISO7816 APDU ==

APDU redirects here but the page says nothing about smart cards nor APDU. <small>—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/81.219.231.40|81.219.231.40]] ([[User talk:81.219.231.40|talk]]) 00:01, 21 December 2007 (UTC)</small><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->

:Smart card APDUs [http://perl.z3950.org/docs/Z3950/APDU.html aren't the only types of APDUs in existence]. [[User:Guy Harris|Guy Harris]] ([[User talk:Guy Harris|talk]]) 00:17, 21 December 2007 (UTC)

:[[APDU]] now redirects to [[Smart card application protocol data unit]] ~[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 19:22, 3 April 2020 (UTC)

== Physical layer: symbol instead of bit ==

Shouldn't the PDU of the physical layer be the '[[Symbol rate|symbol]]' instead of the 'bit'? Most times bits are not transmitted individually if I'm not mistaken. [[User:Qorilla|Qorilla]] ([[User talk:Qorilla|talk]]) 11:30, 31 May 2010 (UTC)

:[https://en.wikipedia.org/w/index.php?title=Protocol_data_unit&diff=prev&oldid=480110009 Implemented] ~[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 19:22, 3 April 2020 (UTC)

== OSI model bias ==

The [[TCP/IP model]] is under-represented here. With [[Internet Protocol]] as dominant as it is, doesn't pdu deserve to be shown in this light as well? [[User:Anon lynx|Stephen Charles Thompson]] ([[User talk:Anon lynx|talk]]) 20:02, 24 January 2012 (UTC)

:We now have [[Protocol data unit#OSI model|OSI model]] and [[Protocol data unit#Internet protocol suite|Internet protocol suite]] examples. ~[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 19:22, 3 April 2020 (UTC)

== OSI layer 1 PDU is bit / symbol vs PPDU ==

Apparently the official definition of the OSI layer 1 PDU is the bit / symbol. Yet the diagram at the top of the article shows the layer 2 PDU encapsulated in a physical layer PDU.

Which is correct?

[[User:Outside2017|Outside2017]] ([[User talk:Outside2017|talk]]) 04:41, 27 September 2018 (UTC)

:Our [http://www.tcpipguide.com/free/t_DataEncapsulationProtocolDataUnitsPDUsandServiceDa.htm TCP/IP Guide] ref says the physical layer works on bits but doesn't identify that as a PDU. The diagram was made by a Wikipedia editor and does not indicate a source. ~[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 19:22, 3 April 2020 (UTC)