Sniffing a TCP communication
In the next Figure, with the exposed frames, we intend to show the composition and analysis of a TCP packet in the several steps of a TCP communication. The numbered frames must be analyzed comparing them with the green pictures, with the sequence of transmitted frames shown in the frame 15. The described communication corresponds to the request and response for the index.html file from condominiopartners.pt website and is broken into connection establishment, session and connection termination. In this frame 15 the shown numbers correspond to the numbers of the frames which were obtained by sniffing the network with WhireShark.