- Definition
- Media Access Control Used on devices like
MAC
- 48 bits length
- First 24 bits are OUI (Organisational Unique Identifier) field
- The 7th most significant bit is called UL (Universal Local) bit –> this MAC addr is universally unique
Structure
![](https://4.bp.blogspot.com/-4r4TR4Y0tfo/UeqCdtUrGCI/AAAAAAAAAMw/elXA0K4hS7E/s1600/MAC-48_Address.svg.png)
Broadcast
- Has DST MAC = FFFFFFF…
- != “Flood” (Unicast: 1:1)
- 1:n
- Sent to everybody on purpose