Encapsulation
When data moves from upper layer to lower level of TCP/IP protocol stack
(outgoing transmission) each layer includes a bundle of relevant
information called a header along with the actual data. The data package
containing the header and the data from the upper layer then becomes
the data that is repackaged at the next lower level with lower layer's
header. Header is the supplemental data placed at the beginning of a
block of data when it is transmitted. This supplemental data is used at
the receiving side to extract the data from the encapsulated data
packet. This packing of data at each layer is known as data
encapsulation.
TCP/IP Encapsulation
Decapsulation
The reverse process of encapsulation (or
decapsulation) occurs when data is received on the destination computer.
As the data moves up from the lower layer to the upper layer of TCP/IP protocol stack
(incoming transmission), each layer unpacks the corresponding header
and uses the information contained in the header to deliver the packet
to the exact network application waiting for the data.
TCP/IP Decapsulation
No comments:
Post a Comment