ports of a computer and its functions
The number of ports on a computer depends on the type of computer it is. The type of ports they have--for example USB, headphone, or HDMI--also varies greatly from computer to computer.
Ports are like doors to a computer each computer has many ports. Without any open ports your computer wouldn't be able to access the internet, to find open ports you can try a portscan
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There is no requirement for the number of Ethernet ports on a computer. There can be 0, 1, or even 1,000 Ethernet ports.
It is an extra set of USB ports for a computer.
There's no possible answer to that. A computer can have any number of USB ports. As the above is true, it doesn't matter how many you use. You can use as much USB ports as you want on your computer.
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Ports
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I/O ports, short for Input/Output ports, are physical interfaces on a computer or device that allow the exchange of data with external devices. These ports can be used for connecting peripherals such as keyboards, mice, printers, and storage devices to a computer. There are different types of I/O ports, including USB, HDMI, Ethernet, and audio ports.
NoYou can open the computer up and remove the USB ports.