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Layer 4 Features
Network Fundamentals / Ch. 6 - TCP/IP Transport, Applications, and Security
Function | Description |
---|---|
Multiplexing using ports | Function that allows receiving hosts to choose the correct application for which the data is destined, based on the port number. |
Error recovery (reliability) | Process of numbering and acknowledging data with Sequence and Acknowledgment header fields. |
Flow control using windowing | Process that uses window sizes to protect buffer space and routing devices. |
Connection establishment and termination | Process used to initialize port numbers and Sequence and Acknowledgment fields. |
Ordered data transfer and data segmentation | Continuous stream of bytes from an upper-layer process that is “segmented” for transmission and delivered to upper-layer processes at the receiving device, with the bytes in the same order. |