the tcp and udp protocols both exist at layer 7 of the osi model.
the tcp and udp protocols both exist at what layer of the osi model?
layer 7
the details of implementation and semantics of the transport layer of the tcp/ip model, which is the foundation of the internet, and the osi model of general networking are different. the protocols in use today in this layer for the internet all originated in the development of tcp/ip. in the osi model the transport layer is often referred to as layer 4, or l4, while numbered layers are not used in tcp/ip.
transport layer
for example, the session and presentation layers of the osi suite are considered to be included to the application layer of the tcp/ip suite. the functionality of the session layer can be found in protocols like http and smtp and is more evident in protocols like telnet and the session initiation protocol (sip). session layer functionality is also realized with the port numbering of the tcp and udp protocols, which cover the transport layer in the tcp/ip suite. functions of the presentation layer are realized in the tcp/ip applications with the mime standard in data exchange.
internet protocol suite