Talk:Protocol data unit: Difference between revisions

Revision as of 07:53, 29 December 2019

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

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==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. [[User:Gravix|Gravix]] 01:05, 1 September 2007 (UTC)

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

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

: It's related to "[[network 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)

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? [[User:Bragador|Bragador]] ([[User talk:Bragador|talk]]) 19:29, 31 July 2009 (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 ==

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: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 ==

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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)

== TPDU ==

I relocated the content from [[TPDU (finance)]] and linked that article here. I had posted this [https://eftlab.co.uk/index.php/site-map/our-articles/295-tpdu-the-transaction-protocol-data-unit source for expansion] in that article's talk page, so it will probably be useful here. BTW, I'm not sure if there's two TPDUs, one in which the T stands for "transaction" and another one in which it stands for "transport", or they're both the same thing. Anyone? --[[User:UKER|uKER]] ([[User talk:UKER|talk]]) 20:16, 3 July 2017 (UTC)

:Hard to say what [[TPDU (finance)]] is since there are no refs and no incoming wikilinks. Maybe [http://www.vanguardnetworks.com/Collateral/Documents/English-US/102_12.pdf this]? ~[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 14:00, 6 July 2017 (UTC)

:I have created a new [[Transaction Protocol Data Unit]] stub article with refs cited above. I have modified [[TPDU]] and [[TPDU (finance)]] to point there. I can't find any reliable information about ''Transport protocol data unit'' and the information in this article is nonspecific and uncited so I have removed this section. ~[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 14:10, 6 May 2019 (UTC)

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

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[[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)

== December 2019 Addition ==

{{User|Cunnfum}} added information to this article yesterday and also several other articles I follow recently. I believe that the user has clear expertuse in the subject area but is new to wikipedia, and the addition here is problematic in a similar way to some other edits. The text inserted reads:

{{Quote|text=When aggregated into linking protocol batches, protocol data units are reconfigured based on the specific framework algorithm. Retrieval issues are prevented by cross-layered data reformatting systematics inherent to the protocol function, effectively securing packaged protocol data units from potential corruption incurred in transmission.}}

The problems I see with this are as follows:

# It is dropped into the middle of a description of a PDU and breaks the flow of that description which was written in a manner designed to help a layman as well as a technical reader to understand the concepts. This therefore causes problems of clarity;

# It introduces cross layer discussion that is unnecessary here;

# I find the English a little opaque. I can try to copy edit that, but not entirely sure what the point being made is, so perhaps that can be discussed here; and

# Two sources were quoted. The first source does not verify because it links to a whole chapter entirely about TCP, and not about a PDU in general. It does not contain anything that supports what seems to be said here. The second source does not use the quoted page numbering so I cannot find the pages referred to.

I would delete the whole thing, and have done so for some other user contributions, but there are positives here too. The editor has provided sources for a page that was distinctly lacking sources, and I think has valuable expertise too. So instead of deleting, I am hoping we can get some discussion here and find a way to focus the contributions in a way that enhance the article for readers. I have, however, flagged the section for clarity and marked the sources to show there are problems to resolve. -- [[User:Sirfurboy|Sirfurboy]] ([[User talk:Sirfurboy|talk]]) 07:53, 29 December 2019 (UTC)