IV. SUMMARY
According to The comparison of OSI and TCPIIP,and
research based on the OSI network model and model
implementation of the agreement, OSI application layer in
the network has an important role, it allows people to easily
discuss and learn the details of protocol specifications, the
standard interface between the layers to facilitate the
engineering module, And then to create a better environment
for the interconnection, while reducing the complexity, make
the program easier to modify, faster product development.
Therefore, OSI model and layer protocol has an important
role.