when using a ethernet shield what is, and where can i find the "mac[] address"?

Using Arduino Programming Questions
1

when using a ethernet shield what is, and where can i find the "mac[] address"?

2

also does the sticker on the back of the ethernet shield with the numbers and letters have any signifigance?

it reads: 90-A2-DA-00-36-5B

3

Make your own one up.
Just make sure it is unique on your network.

4

but what is the mac address?
& what about the sticker?

5

I don't know - which shield do you have?

6

the one in the link's picture

7

I dunno about that one - I've had mine for a few years now, and I usually use 0xdecea5edf00d as a MAC.

8

i figured it out:

Parameters
mac: the MAC (Media access control) address for the device (array of 6 bytes). this is the Ethernet hardware address of your shield. Newer Arduino Ethernet Shields include a sticker with the device's MAC address. For older shields, choose your own.

ip: the IP address of the device (array of 4 bytes)

gateway: the IP address of the network gateway (array of 4 bytes). optional: defaults to the device IP address with the last octet set to 1

subnet: the subnet mask of the network (array of 4 bytes). optional: defaults to 255.255.255.0