mac_address_fields
Designed to verify a MAC address with hex values separated by a colon
VALID
00:00:39:F9:3C:59
00:90:83:6A:B3:B7
00:00:39:59:30:5C
INVALID
00:0H:39:59:30:5C
00:39:59:30:5C
00:39:59:30:5C:BZ