Today, fire wire ports are most often used toconnect………to a computer.
a. keyboards
b. videodevices
c. external drives d. printers

Today, fire wire ports are most often used to connect EXTERNAL DRIVES to a computer.

Explanation:

Fire wire ports are used for high speed data transfer as in case of External Hard Drives. The transfer rate can be as high as up to 48 Mbps. So this technology is used where high data transfer rates are needed. This technology is used in data transfer for digital camcorders also. The other options KEYBOARDS, VIDEO DEVICES and Printers doesn't use Firewire ports. The technology used in Firewire ports is called Full Duplex Communication which means the transfer of data from host to client and client to host happening at the same time. That means two data transfer can happen simultaneously without having to wait for one way of data transfer to happen.

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