Protocol data unit: Difference between revisions

Revision as of 16:58, 6 September 2022

Revision as of 17:03, 6 September 2022

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Given a context pertaining to a specific OSI layer, ''PDU'' is sometimes used as a synonym for its representation at that layer.

===Internetwork packet exchange (IPX)===

* The [[Transport layer]] PDU is the [[Internetwork_Packet_Exchange|SPX packet]] for SPX on top of IPX.

* The [[Network layer]] PDU is the [[Internetwork_Packet_Exchange|IPX packet]] for IPX.

* The [[link layer]] PDU is the [[Frame (networking)|frame]].

===Internet protocol suite===

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On TCP/IP over Ethernet, the data on the physical layer is carried in [[Ethernet frame]]s.

===Internetwork packet exchange (IPX)===

* For [[Internetwork_Packet_Exchange|IPX]], the IPX packet is the network layer PDU is the for IPX, and can simultaneously be used in the transport layer as well.

* The SPX packet on top of IPX, is a transport layer PDU.

* The [[link -layer]] PDU is the [[Frame (networking)|frame]].

===ATM===