transport layer

What is Transport Layer?

Transport layer is the Layer 4 of the Open Systems Interconnection (OSI) reference model. The transport layer is responsible for providing reliable transport services to the upper-layer protocols. These services include the following:

• Flow control to ensure that the transmitting device does not send more data than the receiving device can handle
• Packet sequencing for segmentation of data packets and remote reassembly
• Error handling and acknowledgments to ensure that data is retransmitted when required
• Multiplexing for combining data from several sources for transmission over one data path
• Virtual circuits for establishing sessions between communicating stations