Talk:Protocol data unit

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Computing: Networking Start‑class Low‑importance

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Telecommunications Start‑class Low‑importance

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The content of MAC protocol data unit was merged into Protocol data unit on 2012-04-05. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists. For the discussion at that location, see its talk page.

Diagrams

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

We have a fairly technical lead image now. Here's an alternative -> ~Kvng (talk) 19:22, 3 April 2020 (UTC)[reply]

No word "datagram" found in article

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

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

In the TCP/IP Guide (online version available for free here http://www.tcpipguide.com/free/t_MessagesPacketsFramesDatagramsandCells-2.htm), they say that "datagram" also refers to a PDU of higher levels instead of "data" like this very article is saying. Could someone clarify? Bragador (talk) 19:29, 31 July 2009 (UTC)[reply]

Article currently says ...the User Datagram Protocol (UDP) uses datagrams as protocol data units for connectionless communication. More content in Protocol data unit § Examples brings it home, I think. ~Kvng (talk) 19:22, 3 April 2020 (UTC)[reply]

"Segments" redirection

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

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

ISO7816 APDU

APDU redirects here but the page says nothing about smart cards nor APDU. —Preceding unsigned comment added by 81.219.231.40 (talk) 00:01, 21 December 2007 (UTC)[reply]

Smart card APDUs aren't the only types of APDUs in existence. Guy Harris (talk) 00:17, 21 December 2007 (UTC)[reply]

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

Physical layer: symbol instead of bit

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

Implemented ~Kvng (talk) 19:22, 3 April 2020 (UTC)[reply]

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? Stephen Charles Thompson (talk) 20:02, 24 January 2012 (UTC)[reply]

We now have OSI model and Internet protocol suite examples. ~Kvng (talk) 19:22, 3 April 2020 (UTC)[reply]

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? Outside2017 (talk) 04:41, 27 September 2018 (UTC)[reply]

Our 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. ~Kvng (talk) 19:22, 3 April 2020 (UTC)[reply]