What is MAC Address and Find MAC associat with software

What is a MAC Address?  

A MAC address stand ( Media Access Control )address, is a 48- or 64-bit address associated with a network adapter. While IP addresses are associated with software, MAC addresses are linked to the hardware of network adapters, or LAN  card address .

Operating Systems support various command-line and GUI utilities to allow users to find MAC address of the system. MAC address is a fix t of produced company , it is used for Hexa Decimal bit. and 12 word used for MAC address for Example: AB:5D:C5:F2:A1:B3
   
For this reason, the MAC address is sometimes called the hardware address, the burned-in address (BIA), or the physical address. MAC addresses are expressed in hexadecimal notation in the following format: 01-23-45-67-89-AB, in the case of a 48-bit address, or 01-23-45-67-89-AB-CD-EF, in the case of a 64-bit address. Colons (:) are sometimes used instead of dashes (-).
MAC addresses are often considered permanent, but in some circumstances, they can be changed. There are two types of MAC addresses:


How to find/display your MAC Address
Windows
    Windows NT/2000/2003/XP
    Windows 95/98/ME
    DOS/Windows 3.11/Windows for Workgroups

Macintosh

    Macintosh OS X
    Macintosh OS w/ Open Transport (Pre-MacOS X)
    Macintosh OS w/ MacTCP (Pre-MacOS X)

UNIX/Linux

    Linux
    Solaris/SunOS
    FreeBSD/NetBSD
    OpenBSD
    Caldera/SCO UnixWare/OpenUNIX
    HP-UX (HP UNIX)
    IRIX (SGI UNIX)
    NeXTStep (NeXT UNIX)
    AIX (IBM UNIX)
    Tru64 UNIX (Digital UNIX)