Day 29
Data Encapsulation
Key Topics
Today’s review focuses on how data is encapsulated into packets and frames. This concept is important for understanding normal traffic flow as well as traffic that is encapsulated in a tunnel.
Data Encapsulation Summary
As application data is passed down the protocol stack on its way to be transmitted across the network media, various protocols add information to it at each level. This is commonly known as the encapsulation process.
The data structure at any given layer is called a protocol data unit (PDU). Table 29-1 lists the PDUs at each layer ...
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