Unit of information transmitted over a computer network
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Medium access control (MAC) layer protocol data unit (PDU) becomes physical layer service data unit (SDU).
In telecommunications, a protocol data unit (PDU) is a single unit of information transmitted among peer entities of a computer network. It is composed of protocol-specific control information and user data. In the layered architectures of communication protocol stacks, each layer implements protocols tailored to the specific type or mode of data exchange.
For example, the Transmission Control Protocol (TCP) implements a connection-oriented transfer mode, and the PDU of this protocol is called a segment, while the User Datagram Protocol (UDP) uses datagrams as protocol data units for connectionless communication. A layer lower in the Internet protocol suite, at the Internet layer, the PDU is called a packet, irrespective of its payload type.
and 26 Related for: Protocol data unit information
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layer. This unit of data (SDU) has not yet been encapsulated into a protocoldataunit (PDU) by the lower layer. That SDU is then encapsulated into the lower...
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packet is a formatted unit of data carried by a packet-switched network. A packet consists of control information and user data; the latter is also known...
notifications are sent to port 10162. SNMPv1 specifies five core protocoldataunits (PDUs). Two other PDUs, GetBulkRequest and InformRequest were added...
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers...
frame is a data link layer protocoldataunit and uses the underlying Ethernet physical layer transport mechanisms. In other words, a dataunit on an Ethernet...
(VLAN) throughout a bridged local area network. MSTP uses bridge protocoldataunit (BPDUs) to exchange information between spanning-tree compatible devices...
considerably faster protocol PROFIBUS DP (Decentralised Peripherals) was completed. Profibus FMS is used for (non-deterministic) communication of data between Profibus...
aggregation: MAC service dataunit (MSDU) aggregation and MAC protocoldataunit (MPDU) aggregation. Both types group several data frames into one large...
standard features in its controlling software. A communication unit implements the protocols for messaging with the other nodes in the network. Starting...
of the protocol. Bitstrings longer than the maximum transmission unit (MTU) are divided in pieces of appropriate size. Address formats for data exchange...
Each Frame Relay protocoldataunit (PDU) consists of the following fields: Flag Field. The flag is used to perform high-level data link synchronization...
fragmentation attack Protocoldataunit and Service dataunit Segmentation and reassembly – Arranging data into cells in an ATM network Internet Protocol, Information...
Information Exchange Protocol for use with ISO/IEC 8878 (SNARE) – ITU-T Rec. X.116 [ISO/IEC 10030]. This level is in charge of transferring data between systems...
units (ECUs). Originally developed to reduce the complexity and cost of electrical wiring in automobiles through multiplexing, the CAN bus protocol has...
refers to the TCP protocoldataunit (PDU), datagram to the IP PDU, and frame to the data link layer PDU: Processes transmit data by calling on the TCP...
Remote Terminal Unit can also be configured to spontaneously report Class 1, 2, or 3 data, when it becomes available. The DNP3 protocol supports time synchronization...
payload data are coded separately in EGPRS. The headers are coded more robustly than the data. This is rate at which the RLC/MAC layer protocoldataunit (PDU)...
defined a standard for transmission of the Internet Protocol (which would be the protocoldataunit in this case) over FDDI. It was first proposed in June...
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