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What is the data transmission unit of the transport layer? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

The data transmission unit of the transport layer is: data segment. The transport layer is the fourth layer of the "ISO OSI" protocol, which realizes end-to-end data transmission; this layer is the first end-to-end layer when two computers communicate through the network.

The data transmission unit of the transport layer is: data segment.

The units are:

1. The PDU of the application layer is called data.

2. The PDU of the transport layer is called a data segment.

3. The PDU at the network layer is called packet.

4. The PDU in the network interface layer is called frame.

5. The PDU actually used in the actual transmission of the media is called bit (bit).

Transport layer: it is the fourth layer protocol of ISO OSI protocol, which realizes end-to-end data transmission.

This layer is the first end-to-end layer when two computers communicate through the network, which has a buffering effect.

When the quality of service of the network layer can not meet the requirements, it will improve the service to meet the requirements of the high level; when the quality of service of the network layer is good, it uses only a little work.

The transport layer can also be multiplexed, that is, creating multiple logical connections on a single network connection.

The transport layer provides transparent data transmission between end users and reliable data transmission services to the upper layer.

The transport layer uses flow control, segmentation / reorganization, and error control on a given link. Some protocols are link-oriented.

This means that the transport layer can keep track of the segments and retransmit the failed segments.

Basic function

1. Segmentation and reorganization of data

two。 Address by port number

3. Connection management

4. Error control and flow control, error correction function

5. The transport layer should provide the reliability of communication services to the session layer and avoid errors such as error, loss, delay time disorder, repetition, disorder and so on.

The answer to the question about what is the data transmission unit of the transport layer is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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