Saturday, July 10, 2010

♦ What is Mac Address on your PC

A Media Access Control address :MAC address is a unique identifier assigned to most network adapters or network interface cards (NICs) by the manufacturer where It is LAN Card unique number.

I found 3 way for looking for MAC Address.
#1. using ipconfig command
Windows IP Configuration

   Host Name . . . . . . . . . . . . : jupitor
   Primary Dns Suffix  . . . . . . . : 
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Controller
   Physical Address. . . . . . . . . : 00-12-3F-B1-17-A5
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::1843:faab:fc4:2c9a%12(Preferred) 
   IPv4 Address. . . . . . . . . . . : 192.168.0.8(Preferred) 
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : 17 july 2553 7:31:24
   Lease Expires . . . . . . . . . . : 18 july 2553 7:31:24
   Default Gateway . . . . . . . . . : 192.168.0.1
   DHCP Server . . . . . . . . . . . : 192.168.0.1
   DHCPv6 IAID . . . . . . . . . . . : 251662911
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-13-88-46-01-00-12-3F-B1-15-A5
   DNS Servers . . . . . . . . . . . : 192.168.0.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{E9AB5EFE-77C6-453B-93DC-38C9F6F37820}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

   Connection-specific DNS Suffix  . : 
   Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:3408:d487:82e6:db99(Preferred) 
   Link-local IPv6 Address . . . . . : fe80::3408:d487:82e6:db99%11(Preferred) 
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled

Solution : After you enter this command "ipconfig -all" you 'll see your MAC Address by "Physical Address" in red hightlight above.



#2. using getmac command
Short command from windows : getmac
c:\windows> getmac
Physical Address    Transport name ====================================================
00-12-3F-B1-17-A5   \Device\Tcpip_{E9AB5EFE-77C6-453B-93DC-38C9F6F37820}      
41-56-45-00-00-30   N/A                                                       


         Solution: getmac DOS command come with windows 7 easy use and get MAC Address unique number on your computer . Don't forget It is unique number of LAN Card. (or Network interface Card).

#3. using nbtstat command
      c:\windows>nbtstat -a [your ip address]
      c:\windows>nbtstat -a 192.168.0.8
Local Area Connection:
 Node IpAddress: [192.168.0.8] Scope Id: []

           NetBIOS Remote Machine Name Table

       Name               Type         Status
    ---------------------------------------------
    JUPITOR        <20>  UNIQUE      Registered 
    JUPITOR        <00>  UNIQUE      Registered 
    WORKGROUP      <00>  GROUP       Registered 
    WORKGROUP      <1E>  GROUP       Registered 
    WORKGROUP      <1D>  UNIQUE      Registered 
    ..__MSBROWSE__.<01>  GROUP       Registered 

    MAC Address = 00-12-3F-B1-17-A5
--end--
MAC Address Format                 MAC addresses are 48 bits, expressed as 12 hexadecimal digits (0-9, plus A-F, capitalized). The 12 hex digits of source address consist of vendor of the Ethernet network interface.
                 xx-xx-xx-xx
                 00-12-3f- xx-xx-xx  is Dell inc.
Reference : Ethernet MAC

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