Ethernetkehyksillä

Ethernetkehyksillä, known in English as Ethernet frames, are fundamental units of data transmission within Ethernet networks. They encapsulate data packets that are sent between devices on a local area network (LAN). Each Ethernet frame consists of a specific structure, including a preamble, start frame delimiter, destination MAC address, source MAC address, EtherType, and the payload. The preamble and start frame delimiter are used for synchronization purposes. The MAC addresses identify the intended recipient and the sender of the frame. The EtherType field indicates the network layer protocol being carried, such as IP. The payload contains the actual data being transmitted. Finally, the frame concludes with a Frame Check Sequence (FCS), which is used for error detection. The maximum size of an Ethernet frame, excluding the preamble and FCS, is typically 1518 bytes, though variations like jumbo frames allow for larger payloads. Understanding Ethernet frames is crucial for comprehending how data moves across Ethernet networks and for network troubleshooting.