Introduction Main section Network adapter Types of network protocols

How to Know Whether a Network Adapter Is Present

Newer computers often include a network adapter when sold. Determine whether a computer already possesses a network adapter as follows:

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  In both desktop and laptop computers, look for an RJ-45 jack on the back of the computer. The RJ-45 jack appears similar to a phone line jack but is slightly larger.
  
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  In notebook computers, look for a thin, removable metal device roughly the size of credit card.
  
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  For notebook computers running Windows that may contain integrated adapter chips, open the Windows Device Manager. Access Device Manager from the Hardware tab of the System Properties section of Windows Control Panel.
  
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  In any type of computing device, look for a small external device with LED lights connected to a USB port