Figure 2-11: Internet and Transport Layer, Cont Recap Transport Layer end-to-end (host-to-host) Server Client Pc TCP is connection -oriented reliable UDP is connectionless and unreliable Internet Layer (usually IP) hop-by-hop(host-router or router-router) connectionless unreliable Router 1 Router 2 Router 38-4 Figure 2-11: Internet and Transport Layer, Cont. Transport Layer end-to-end (host-to-host) TCP is connection-oriented, reliable UDP is connectionless and unreliable Internet Layer (usually IP) hop-by-hop (host-router or router-router) connectionless, unreliable Router 1 Router 2 Router 3 Client PC Server Recap