data transport layer - meaning and definition. What is data transport layer
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What (who) is data transport layer - definition

SECOND LAYER OF THE OSI NETWORKING MODEL
Layer 2; OSI layer 2; Datalink layer; Data link Layer; OSI Layer 2; Data Link Layer; Data-link-layer; Data-link layer; Layer-2

layer 4         
  • alt=Four labelled stacked blocks. The blue block labelled "transport" is the second from the top.
LAYER IN THE OSI AND TCP/IP MODELS PROVIDING HOST-TO-HOST COMMUNICATION SERVICES FOR APPLICATIONS
Layer 4; OSI layer 4; Transport protocol; X.214; Host-to-host layer; OSI Layer 4; Transport Layer; Transport-layer; Comparison of transport layer protocols; Comparison of OSI transport protocols; Transport-layer protocol
X.214         
  • alt=Four labelled stacked blocks. The blue block labelled "transport" is the second from the top.
LAYER IN THE OSI AND TCP/IP MODELS PROVIDING HOST-TO-HOST COMMUNICATION SERVICES FOR APPLICATIONS
Layer 4; OSI layer 4; Transport protocol; X.214; Host-to-host layer; OSI Layer 4; Transport Layer; Transport-layer; Comparison of transport layer protocols; Comparison of OSI transport protocols; Transport-layer protocol
transport layer         
  • alt=Four labelled stacked blocks. The blue block labelled "transport" is the second from the top.
LAYER IN THE OSI AND TCP/IP MODELS PROVIDING HOST-TO-HOST COMMUNICATION SERVICES FOR APPLICATIONS
Layer 4; OSI layer 4; Transport protocol; X.214; Host-to-host layer; OSI Layer 4; Transport Layer; Transport-layer; Comparison of transport layer protocols; Comparison of OSI transport protocols; Transport-layer protocol
<networking> (Or "host-host layer") The middle layer in the OSI seven layer model. The transport layer determines how to use the network layer to provide a virtual error-free, point to point connection so that host A can send messages to host B and they will arrive un-corrupted and in the correct order. It establishes and dissolves connections between hosts. It is used by the session layer. An example transport layer protocol is {Transmission Control Protocol} (TCP). OSI documents: ITU Rec. X.214 (ISO 8072), ITU Rec. X.224 (ISO 8073). (1997-12-07)

Wikipedia

Data link layer

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 data between nodes on a network segment across the physical layer. The data link layer provides the functional and procedural means to transfer data between network entities and may also provide the means to detect and possibly correct errors that can occur in the physical layer.

The data link layer is concerned with local delivery of frames between nodes on the same level of the network. Data-link frames, as these protocol data units are called, do not cross the boundaries of a local area network. Inter-network routing and global addressing are higher-layer functions, allowing data-link protocols to focus on local delivery, addressing, and media arbitration. In this way, the data link layer is analogous to a neighborhood traffic cop; it endeavors to arbitrate between parties contending for access to a medium, without concern for their ultimate destination. When devices attempt to use a medium simultaneously, frame collisions occur. Data-link protocols specify how devices detect and recover from such collisions, and may provide mechanisms to reduce or prevent them.

Examples of data link protocols are Ethernet, the IEEE 802.11 WiFi protocols, ATM and Frame Relay. In the Internet Protocol Suite (TCP/IP), the data link layer functionality is contained within the link layer, the lowest layer of the descriptive model, which is assumed to be independent of physical infrastructure.