Network + class 1/20/10

Today we discussed the OSI model. This model consists of 7 layers and it depicts how information is processed and sent out by the user through a network. When the information is first being sent out it is going from layer 7 to layer 1, this is called decapsulation. When the data is being received then it goes from layer 1 to layer 7, this process is called incapsulation. The layers of the OSI model are Layer 7: Application, Layer 6: Presentation, Layer 5: Session, Layer 4: Transport, Layer 3: Network, Layer 2: Data Link, and Layer 1: Physical. Layers 1-3 are the layers that consist of the Hub and cables, NIC card, and router (in this order).