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Why are the keyboard and mouse a peripheral?

Many computer users are surprised to learn that a computer can run without a keyboard and a mouse. Both devices are not required for a computer to run, which is why they're considered peripherals. Many servers at data centers have no keyboard or mouse, and are often managed remotely.

What peripheral devices come with a computer?

When you buy a new desktop computer, it comes with a keyboard, mouse, sound card, power plug, and may also include a monitor. A laptop computer includes everything, so it only includes a power cord.
Tip
See our computer definition for a full listing of computer components and everything found on a computer.

How do peripheral devices connect to a computer?

Today, most non-wireless peripheral devices use one of the following types of cables and connections to connect to a computer. These cable and connection types are listed in order of most common to least common.

• 
  USB
  
• 
  Lightning
  
• 
  FireWire
  
• 
  Thunderbolt
  
• 
  eSATA
  

Older peripheral devices used one of the following types of cables and connections to connect to a computer.

• 
  Parallel port
  
• 
  Serial port
  
• 
  SCSI
  

Some peripheral devices are designed to use a wireless connection to connect to a computer. The most common wireless protocols used by wireless peripheral devices are listed below.

• 
  Bluetooth
  
• 
  Wi-Fi
  

Are peripherals internal or external?

Generally speaking, most peripherals are external devices. However, there are also devices like a sound card and tape drive that are internal devices and also peripherals. So, a peripheral could be an external or internal device.

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