Hallo FLOST,
also hier der ganze Text:
Ethernet Lan adressing identifies either indivisual devices or groups of devices on a LAN. Unicast Ethernet addresses identify a single LAN Card. Each address I 6 bytes long, is usually written in hexadecimal, and, in Cisco devices, typically is written with periods separating each set of four hex digits. For example 0000.0C12.3456 is a valid Ethernet address. The term unicast addresses, or individual addresses is used because it identifies an individual LAN interface card. (The term unicast was chosen mainly for contrast with the terms broadcast, multicast, and group addresses.)
Computers use these addresses to identify the sender and receiver of an Etherent frame. For instance, imagine that Fred and Barney are on the same Ethernet, and Fred sends Barney a frame. Fred puts his own Ethernetz MAC Adress in the Ethernet header as the source address and uses Barneys Ethernet MAC address as the destination. When Barney receives the frame, he notices that the destination address is his own address, so Barney processes the frames. If Barney receives a frame with some other devices unicats address in the destination address field, Barney simply does not process the frame.
Gruß
Mara