In networking, PDU means "protocol data unit", and it is the generic name of the "packets" of data used at different levels of the network. Using the numbering of the OSI layers:
At layer 2, the PDUs are called "frame". Example: An Ethernet frame, a frame-relay frame.
At layer 3, the PDUs are called "packets". Example: An IP packet.
At layer 4, the PDUs are called "segments". Example: A TCP segment, a UDP segment.
The PDU at the Network layer is referred to as a packet. A PDU at the Data Link Layer is referred to as a frame.
The Header and the payload The Header and the payload
Datagrams TCP/IP layer 4 PDU's are called segments...
The PDU (protocol data unit) @ transport layer (e.g. TCP or UDP) is called as 'segment' .
PDU (protocol data units) -Yuriy-
In the OSI model, each layer has a specific Protocol Data Unit (PDU). At the application layer, the PDU is called a message; at the transport layer, it is a segment (for TCP) or a datagram (for UDP); at the network layer, it is a packet; at the data link layer, it is a frame; and at the physical layer, the PDU is a bit. Each PDU encapsulates the relevant data and control information required for communication at that particular layer, facilitating the flow of data through the network.
Frames
protocol data unit
What is a PDU? corruption of a frame during transmission data reassembled at the destination retransmitted packets due to lost communication a layer specific encapsulation
Segements
PDU, or Protocol Data Unit, refers to a unit of data specified in a protocol of a given layer in the OSI model. It encompasses the headers and payload relevant to a specific layer, facilitating communication across network systems. For example, in the transport layer, a PDU is called a segment, while in the network layer, it is referred to as a packet. Each layer's PDU serves its distinct purpose and adheres to the rules of the corresponding protocol.
yes but not the other way around