Layers 7 through 4 are geared more to the application than the lower layers, which are designed to move packets from one place to another no matter what they contain. This top layer defines the ...

which resides at layers 3 and 4. To understand network communications, it is essential to learn about the protocol layers (see OSI model). The IP layer 3 breaks apart the data being transmitted ...

Open System Interconnection, a layered model for network transport and applications. For instance, the seventh layer in the OSI model—the Application layer—defines program to program communication, or ...