To operate a graphical user interface, a user types keyboard commands to tell a computer which tasks to perform.

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What is the T-Carrier communication technology?

A. T-Carriers are used with digital modem devices designed for the cable TV system, providing high speed data transfer. B. T-Carriers use advanced modulation techniques on regular telephone lines between subscribers and a telephone company. C. T-Carriers are dedicated leased telephone line that can be used for data communications over multiple channels. D. T-Carriers are packet switch based connections for connecting to remote networks with speeds up to 2.048 Mbps.