Content deleted Content added
m unpiped links using script |
Mehrdad.drpc (talk | contribs) Add layer 2 PDU name (segment) Tags: Reverted Visual edit Mobile edit Mobile web edit |
||
Line 8:
In [[telecommunication]]s, 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 [[Payload (computing)|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 [[datagram]]s as protocol data units for [[connectionless communication]]. A layer lower in the [[Internet protocol suite]], at the [[Internet layer]], the PDU is called a [[network packet|packet]], irrespective of its payload type. And at layer two [[Link layer]], the PDU is called a [[Network segment|segment]].
==Packet-switched data networks==
| |||