Application 6 Presentation 5 4 Transport 3 2 Data Link Application Session Transport Internet Network Interface TCP/IP Network Physical OSI Reference Model TCP layers (true or false) true true true true false - Routers are handled at the Transport layer false- the Network (Internet) layer is involved with routing of messages false - Choosing the reply port number is done at the Application layer false - Encryption is done at the Application layer at the false - Encryption is done au