Network+ N10-009

Network+ N10-009 Layer 1 - Physical: Receives the frames and data and sends them via the local media (copper wires, fiberoptic cables, etc.) to the switches, routers, etc., along the network path. Layer 2 - Data link: - Receives the packets and adds physical addressing by adding sender and receiver MAC addresses to each data packet. - This information forms a unit called a frame. Layer 3 - Network: The routing layer (IP addresses, routers, packets). Layer 4 - Transport: The functions defined in this layer provide for the reliable transmission of data segments, as well as the disassembly and assembly of the data before and after transmission. Layer 5 - Session: - Establishes, manages, and terminates sessions between two communicating hosts. - Synchronizes dialog between the presentation layers of the two hosts and manages their data exchange.