Packets not intended for a computer's MAC address are dropped. So sending data from 1 to 3 requires sending data from 1 to 2, 3, and 4. Packets sent to one port, on a hub, are sent to all other ports. Hubs are basically repeating devices, operating only at the physical layer. They aren't found in many modern networks (they're replaced by switches). Hubs are capable of operating in only half duplex mode. (Please Do Not Touch Steve's Pet Alligator)ĭifferent nodes or computers on the network are only connected at the physical level. The physical medium for the network communication signals. Provides addressing scheme to identify physical devices, bridges, switches, MAC addresses. Handles packet fragmentation and error detection. Provide reliable data transport services to lower layers. Manages communication sessions between computers.
Handles encryption/description for secure data Transforms data received into a format that is readable by the application layer. Topmost layer, provides users a means to access network resources (only level seen by end user)
The seven-layer OSI model for network communications splits communications process into seven separate layers:
0 kommentar(er)
