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Short Answer 2.1

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What critical I/O Devices are Necessary to use a personal computer? Which ones are not necessary for normal day-to-day use and why?
A: The Critical I/O Devices necessary to use a personal computer are the Mouse, the keyboard, The Monitor, The USB ports and the Internet ports.
A2: Serial (COM) ports are not necessary for normal day to day use. The optional features include: External modems ,Serial mouse or pointing devices such as trackballs or touchpads, Plotters, Label printers, Serial printers, PDA docking stations, Digital cameras and PC-to-PC connections used by file transfer programs such as Direct Cable Connection, LapLink, and Interlink
Team, Pearson C. Computer Structure and Logic. Pearson Custom Publishing, 2011. VitalBook file.
Why a modem is considered an I/O device?
A: A Modem is considered an I/O Device because more specifically a Null-Modem cable enables two computers to communicate directly with each other by crossing the receive and transmit wires (meaning that two computers can send and receive data, much like a computer network, though much slower) The Modem is Input and output, allowing two devices to receive and send data to one another.
Team, Pearson C. Computer Structure and Logic. Pearson Custom Publishing, 2011. VitalBook file.

Why do I think a Printer is classified as an input device?
A: The Reason I feel a printer is also in Input device is because printers now a days are Multifunctional. Printers have the capabilities to send fax machines for one. In order to send a fax you have to type in the fax number. By having to input the number by pressing those numbers it’s Input.

Though a printer is an essential I/O device, can you think of why it may also be classified as an input device?
A: The Data from the computer output to the printer which inputs the information.
Devices other than printers that plug into the parallel (LPT)

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