What is a MAC address?

A MAC address is a unique identifier for anything that can connect to a network, including
the internet. It comes in the format 00:00:00:00:00:00. Any individual character in a MAC
address may have a value of 0-9 or A-F. Additionally, the first two digits are almost always
00. It is assigned to the device (the network card in your computer, your cable modem,
even in some cases your mobile phone) by the manufacturer at the time it is built, and
never changes. No two devices in the world should have the same MAC address. If they
do, it can cause communication problems and confusion between the equipment that is
trying to contact a device with a duplicated address. Please note, some routers offer the
option to change the MAC address the router broadcasts as to simulate your computer being
directly connected. While this is an option that Mediacom is just fine with you using, it is
recommended that you opt to not use "MAC address cloning" to simulate this, as it can
cause problems in the future.
The MAC address on your modem is commonly used by support technicians to find possible
problems with your modem. It is generally found on a sticker on the back or bottom of the
modem.