Protocol data unit: Difference between revisions

Revision as of 14:57, 2 October 2024

Revision as of 08:35, 26 February 2025

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Protocol data units of the [[OSI model]] are:<ref>{{Cite web |url=http://www.tcpipguide.com/free/t_DataEncapsulationProtocolDataUnitsPDUsandServiceDa.htm |title=Data Encapsulation, Protocol Data Units (PDUs) and Service Data Units (SDUs) |work=The TCP/IP Guide |access-date=2012-04-05}}</ref>

*The Layer 4: [[transport layer]] PDU is the [[Packet segmentsegmentation|segment]] or the [[datagram]].

*The Layer 3: [[network layer]] PDU is the [[Network packet|packet]] or the [[datagram]]<ref>{{Cite web|url=https://www.cloudflare.com/learning/network-layer/what-is-a-packet/|title=What is a packet? {{!}} Network packet definition|work=Cloudflare}}</ref>.

*The Layer 2: [[data link layer]] PDU is the [[Frame (networking)|frame]].

*The Layer 1: [[physical layer]] PDU is the [[bit]] or, more generally, [[Symbol (data)|symbol]].