2022年4月29日 · Protocol Data Unit (PDU) The OSI model, which was first introduced by the International Organization for Standardization (ISO) in 1977, is a reference that specifies the transferring of data from one computer to another computer.

Protocol data units of the OSI model are: [1] The Layer 4: transport layer PDU is the segment. The Layer 3: network layer PDU is the packet or the datagram. [2] The Layer 2: data link layer PDU is the frame. The Layer 1: physical layer PDU is the bit or, more generally, symbol.

A protocol data unit (PDU) is the basic unit of exchange between entities that communicate with a specified networking protocol. It's important for network professionals to use the correct PDU when they work with a multilayer protocol stack and manage protocol interactions.

2023年6月17日 · A PDU, or Protocol Data Unit, is a unit of data that is passed down between layers in the OSI model. Each layer adds its own header and footer to the payload, creating a new PDU for the next layer to process.

2023年6月17日 · The Protocol Data Unit (PDU) is a critical term that is associated with the first four layers of the OSI model, specifically with the TCP/IP protocol suite. It helps to identify the specific data that is being sent between different layers of communication.

2023年8月26日 · Building on that foundation, this article aims to dive deeper, specifically focusing on the Protocol Data Units (PDUs) across the OSI layers – illuminating their operations and their crucial encapsulations.

2025年1月6日 · Protocol Data Units (PDUs) are standard communication units used in a network to carry information from one entity to another. They belong to a particular level or layer of the OSI (Open Systems Interconnection) model and contain the necessary information for that specific layer to operate.