The standard (IEEE 802) format for printing （ ） in human-friendly formis six groups of two hexadecimal digits, separated by hyphens (-) or colons (:),in transmission order, e.g. 01-23-45-67-89-ab, 01:23:45:67:89:ab. This form isalso commonly used for EUI-64.
A、hard disk logical block address
B、IP address
C、mail address
D、MAC address