Mac Address

What

48-bit number, used to uniquely identify devices.

How to convert from binary:

• A single digit represents 4 bits. ($2^4=16\text{possibilities}=16^1$)
• There’s 12 digits.
• You do the Maths lol.

Network Interfaces:

Anything with a network interface comes with a predefined MAC address. This is to uniquely identify it within the network. Fun fact, the first 3 octets are manufacturer specific:
- Cisco is 00-1A-A1
- Apple is 00-0a-95