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connectionless protocols - transport layer
transport layer
Layer 5 - Session layer
TCP and UDP are transport layer protocols; the OSI layer is layer 4 (transport)
The network layer protocol is Trivial File Transfer Protocol (TFTP)
Network Layer
Network control protocol
Application Presentation Session
Session Layer
Router works in Network Layer of OSI model
TELNET
There is a good descrition of the network layer and TCP in the related link. NO. In general TCP and UDP are transport protocols that operates in Layer 4 Transport Layer