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A MAC address (Media Access Control) is a unique hardware number assigned to a Network Interface Card. It is 12- digit and contains numbers and letters. 
It may have several different names, the MAC address is sometimes called Ethernet Address, Hardware Address, Network Address or Physical Address depending on the manufacturer.
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'''Examples of possible MAC addresses:'''
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||<tablestyle="width: 99%; background-color: #FFFFB2;"> 080007A92BFC ||    09:00:07:A9:B2:EB ||   09-10-4A-B9-E2-A4 ||
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== How to find your MAC address? ==
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=== Linux ===
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Type '''/sbin/ifconfig –a''' at the shell prompt, then press Enter or Return.
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||<tablestyle="width: 99%; background-color: #E0E0FF;"> /!\ You will find the hardware address listed after HWaddr. ||
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=== Windows 7 ===
 * Click on '''Start''' or press the windows key 
 * In the menue ''Search programs and files'' type '''cmd''' and press '''Enter'''
 * This will launch an MS-DOS window. At the prompt (C:\>), type the following and press Enter:  '''ipconfig/all'''
||<tablestyle="width: 99%; background-color: #E0E0FF;"> /!\ Under the settings for your ethernet connection you will see your MAC address listed by physical address. ||
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=== Macintosh ===
 * Go to the '''Apple''' (top left corner)
 * Select '''System Preferences''' 
 * Select '''Network'''
 * to find the MAC address for '''Ethernet''': 
  * Select Ethernet on the left-hand side and press the button '''Advanced'''
  * Go to the tab '''Hardware'''
 * to find the MAC address for '''Wi-Fi'''
  * Select Wi-Fi on the left-hand side and press the button '''Advanced'''
  * Go to the tab '''Hardware'''
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=== iPad ===
Go to the '''Settings''' --> '''General''' --> '''About'''
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||<tablestyle="width: 99%; background-color: #E0E0FF;"> /!\  The Wi-Fi address is your MAC address. ||
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If you need help please send an email to <<MailTo(uco-zn AT desy DOT de)>>
  

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