IP/MAC Addresses Serial #3Online version Learners will use reference IP Addresses, MAC Addresses and Serial Numbers Reference Guide to identify the correct hardware. by Elizabeth Halter 1 My serial number has 8 digits. Hints 1 Both my serial number and model number begin with 2. 2 My MAC Address has the letters "a" and "b" in it. 3 My model number is 2000-00