Data Encapsulation

Data Encapsulation
Data encapsulation
is the process by which the information in a protocol is wrapped, or contained,
in the data section of another protocol. In the OSI reference model, each layer encapsulates
the layer immediately above it as the data flows down the protocol stack.
The logical communication that happens at each layer of the OSI reference model doesn’t
involve many physical connections, because the information each protocol needs to send is
encapsulated in the layer of protocol information beneath it. This encapsulation produces a set
of data called a packet (see Figure 12.5).