Data Link

Peerto Peer Communication

Desktop Protocol Stack

For data to travel from the source to the destination, each layer of the OSI reference model at the source must communicate with its peer layer at the destination. This form of communication is referred to as peer-to-peer communication. During this process, the protocols at each layer exchange information, called protocol data units (PDU), between peer layers, as shown in Figure 1-23. Data packets on a network originate at a source and then travel to a destination. Each layer depends on the...