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below it. As data is transmitted from one user (or computer) to another user, the
data moves down through the stack of layers and is modified so that it can be
understood by the next layer. At the receiving user’s end, the modified data moves
in reverse through the layers until it ends up in its original format and can be
understood.
The main differences between TCP/IP and OSI are as follows:
• The application layer in TCP/IP handles the responsibilities of Layers 5,
6, and 7 in the OSI model.
• The host-to-host transport layer in TCP/IP does not always guarantee as
reliable a delivery of packets as the transport ...