Application Layer
transport layer
The OSI layer that manages end-to-end delivery of data is the Transport Layer, which is the fourth layer of the OSI model. It is responsible for ensuring complete data transfer, error recovery, and flow control between hosts. Protocols such as TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate at this layer to provide reliable or fast data delivery, respectively.
The session layer (layer 5)
Data link layer
Layer 2 (Data Link Layer) http://compnetworking.about.com/cs/internetworking/g/bldef_bridge.htm
The OSI layer responsible for establishing, maintaining, and terminating connections with the destination is the Session Layer, which is the fifth layer of the OSI model. It manages sessions between applications, ensuring that data exchange occurs smoothly and efficiently. This layer provides mechanisms for controlling the dialog and synchronization between communication parties.
Data Link Layer
TELNET
Data-Link layer.
Data Link Layer
network layer
Layer 2 - The Data Link Layer Layer 2 of the OSI model provides error-detection capability