In this section, a protocol graph will be used to illustrate the relationships among the
protocols. e protocols in the application layer handle data communication requests
and responses by application software. However, the protocols in the application layer
cannot deliver or receive data through a network by themselves. To deliver the data to
a destination host in a network, the data block needs to be chopped into small units
and carried by the IP protocol to the destination host. To reach the destination host,
one needs a protocol such as TCP to create a connection between two hosts on the
net ...
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