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Transport Layer topics include: TCP, UDP, AH and ESP protocols.
The transport layer is the fourth layer of the Open Systems Interconnection (OSI) model. It is responsible for ensuring that data packets arrive accurately and reliably between a sender and receiver.
The transport layer provides the following services: End-to-end delivery, Addressing, Reliable delivery, Flow control, Multiplexing, Congestion control. The transport layer uses TCP or User Datagram Protocol (UDP) most often.
The transport layer's responsibilities include: Multiplexing: Combining multiple data streams into a single transmission channel Demultiplexing: Separating a single transmission channel into multiple data streams at the receiving end Congestion control: A mechanism that controls the entry of data packets into the network Flow control: Controls the reliability of a given link through flow control, segmentation and desegmentation, and error control
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