Each computer on the network has a unique identifier. As you send a letter in the mail, send a unique identifier for the data on the network computer using a specific computer. Most networks today, including all computers on the Internet, using TCP / IP protocol on how to communicate on the network standard. In the TCP / IP protocol, a unique identifier for a computer is known as its IP address.

IP address:
There are several ways to determine your computer’s IP address:

  • Visit website online tools, such as whatismyipaddress.com
  • Once your machine is restarted, the network diagnostic / connection settings usually appear as loading the operating system.

MAC address
In computer networking, a MAC address, better known as MAC address is assigned by the manufacturer to identify the network adapter or network interface card (NIC) is a unique identifier. The MAC address may also be called an Ethernet Hardware Address (EHA), hardware address, physical address or adapter address. Your computer may have more than one MAC address. You have a wireless and Ethernet ports? Then, you must have at least two MAC addresses. Your smart phone is likely to have a MAC address – the iPhone I have two; one for radio and one for Bluetooth.

MAC address is usually six groups of two hexadecimal digits (0-9, A, B, C, D, E, F), or separated by a colon (:) or a hyphen (-). In the Wi-Fi MAC address on my iPhone, for example: 00: 1C: B3: 09: 85: 15. The first three numbers, 00: 1C: B3, is the code Apple made; only Apple products will be the beginning of the MAC address numbers. (Settings, and then always so on Wi-Fi Address)

Why do you care about the MAC address? Generally, you do not know. However, if you have been hacked and is connected to the network, or if your computer failure, the ACCC security, network, business, or servicing you may need to tell them what it is to help them solve your problem. So here it is how to tell.

The Windows NT, 2000, XP, Vista in, Windows 7

  1. Click Start, then Run (in Windows 7, launch and in the Search programs and files box, type).
  2. Input: CMD
  3. Enter: IPCONFIG / ALL
    Get out of your screen output, it will Vista and Windows7, use: IPCONFIG / ALL | More
  4. Your MAC address is a physical address; it looks like 00-15-E9-2B-99-3C. You will have your physical address for each network connection.


This is using the ipconfig output on Windows XP. My XP computer has two network connections – Ethernet connections, local and wireless connections mark, mark Wi-Fi (wireless connection is not currently set).
Your computer’s network adapter actual list of all XP. Vista and 7, on the other hand, lists a number of possible additional network connections, even if they are not used. But the wireless local connection part is the same.

In Windows 95/98 / ME

  1. Click Start, then Run
  2. Type: WINIPCFG, and then click OK.
  3. Select the network adapter you are interested,
  4. Box marked adapter address is your MAC address; it looks like 00-15-E9-2B-99-3C.

Mac OS X Tiger’s up to Mac OS X 10.4

  1. Click the Apple menu, then System Preferences and then Network
  2. MAC address for wired Ethernet connection:
    • From the Show: menu, select Built-in Ethernet.
    • Ethernet tab (for Mac OS X 10.2 TCP / IP tab or earlier), Ethernet ID is your MAC address.
  3. MAC address of the wireless connection:
    • From the Show: menu, select Airport.
    • Tab at the airport, the airport ID is your MAC address. The figure is in the Mac OS X Tiger will AirPort card.

The Mac OS X Leopard and Snow Leopard, and 10.5 and 10.6

  • Click the Apple menu, then System Preferences and then Network
  • MAC address for wired Ethernet connection:
    • Select Ethernet from the list on the left.
    • Click the Advanced button.
    • Ethernet card, Ethernet ID is your MAC address.
  • MAC address of the wireless connection:
    • Select airport from the list on the left.
    • Click the Advanced button.
    • Tab at the airport, the airport ID is your MAC address.

Classic Macintosh with Open Transport

  1. Click on the Apple menu, then Control Panel TCP / IP control panel
  2. By connecting from: menu, select Ethernet.
  3. Click the Info button.
  4. Hardware address is your MAC address.

Macintosh Classic and MacTCP
If you have an open transmission, use it. If not, when you are connected to an Ethernet network (the Internet, for example), do the following:

  1. Click the System folder, and then Control Panel, then MacTCP Control Panel
  2. If not depressed Shift or Caps Lock key and while holding down the Option key, click the built-in Ethernet icon.
  3. Hardware address is your MAC address.


  1. Become root, use su.
  2. Enter the command: ifconfig-a
     # ifconfig -a eth0 Link encap:Ethernet HWaddr
     00:09:3D:12:33:33 inet addr: 
    Bcast: Mask: inet6 
    addr: fe50::234:3dff:fe12:7d73/64 
     Metric:1 RX packets:3489041718 errors:0 dropped:0
     overruns:0 frame:0 TX packets:3259212142 errors:0
     dropped:0 overruns:0 carrier:0 collisions:0 
    txqueuelen:1000 RX bytes:2732221481 (2.5 GiB) 
    TX bytes:4065716672 (3.7 GiB) Interrupt:185 
  3. eth0 Ethernet device is called for, eth1, and so the MAC address in the first line of output, labeled HWaddr, it is 00: 09: 3D: 12: 33: 33.

The FreeBSD / NetBSD’s

  1. Become root, use su.
  2. Enter the command: ifconfig
    Related Information:

    en0: flags=8863<UP,BROADCAST,SMART,
    ether 00:1f:f3:5b:2b:1f
    media: autoselect status: inactive
    supported media: autoselect 10baseT/UTP 
    10baseT/UTP <full-duplex,hw-loopback>
     10baseT/UTP <full-duplex,flow-control>
    100baseTX 100baseTX 100baseTX <full-duplex,
    100baseTX <full-duplex,flow-control> 
    1000baseT 1000baseT <full-duplex,hw-loopback>
    1000baseT <full-duplex,flow-control>
    en1: flags=8863<UP,BROADCAST,SMART
    inet6 fe80::21f:5bff:fec7:ee2f%en1 
    prefixlen 64 scopeid 0x5
    inet netmask 0xffffff00 
    ether 00:1f:5b:c7:ee:2f
    media: autoselect status: active
    supported media: autoselect
  3. In the present embodiment, the Ethernet port is to en0; it is not being used and it is the MAC address ether 00: 1F: F3: 5b: Figure 2b: 1F. Wireless is EN1; it is by its MAC address is an ether 00: 1F: 5B: C7: EE: 2F.

The new version of HP-UX use: – get the nwmgr

for example:

# nwmgr --get 
Name/           Interface Station          Sub-   Interface      Related 
ClassInstance   State     Address        system   Type           Interface 
==============  ========= ============== ======== ============== ========= 
lan0            UP        0x00306EF4E07C igelan   1000Base-T 
lan1            UP        0x000F202B92D4 igelan   1000Base-T 
lan2            UP        0x0010837BDE00 btlan    100Base-TX

The station address is the MAC address, such as opening lan0, it is 00: 30: 6E: F4: E0: 7C.

In older versions of HP-UX, you may have to use lanscan in.