The standard (IEEE 802)format for printing () in human-friendly form is 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 is also commonly used for EUI-64.
A.hard disk logical block address
B.IP address
C.mail address
D.MAC address