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Jul 13, 2015 at 12:00 comment added Todd Wilcox Many people like to reserve the word "packet" to refer to the layer 3 protocol data unit. Ethernet PDUs are considered layer 2 PDUs and are usually called "frames". While layer 1 doesn't always specify a PDU at all, sometimes a "bit", "symbol", or "stream" is considered a layer 1 PDU. While people usually understand what is meant when "packet" is used for layers other than 3, using the standard terms helps keep things clear. See: en.wikipedia.org/wiki/Protocol_data_unit
Jul 12, 2015 at 19:29 vote accept user4430615
Jul 12, 2015 at 18:56 history edited Pieter CC BY-SA 3.0
Question was updated, simplified a sentance
Jul 12, 2015 at 16:29 comment added user4430615 I mean an individual packet at the hardware level, I've edited the question to hopefully make this clearer
Jul 12, 2015 at 15:43 history answered Pieter CC BY-SA 3.0