CompTIA A+® Certification All-In-One For Dummies®, 2nd Edition

2.7. Answers

1. A, D. Serial ports, which are used by serial mice, come in two formats: 9-pin and 25-pin. See "Installing a mouse".

2. B. USB 1.1 devices run at 12 Mbps, and USB 2.0 devices run at 480 Mbps. Review "Installing a mouse".

3. B. Natural keyboards are a form of ergonomic keyboard that reduces repetitive stress injuries. Check out "Identifying keyboard types".

4. A. A mechanical mouse uses all moving parts, such as a rubber ball that moves wheels that are picked up by sensors to detect mouse movements. Peruse "Types of mice".

5. C. The AT command used by modems to hang up a connection is ATH — the H stands for hang up. Take a look at "AT commands".

6. D. USB 2.0 runs at 480 Mbps, and USB 1.1 runs at a lower speed of 12 Mbps. Peek at "Installing a mouse".

7. A, C. Popular connections used by the mouse today are the USB connector and the PS/2 connector. Look over "Installing a mouse".

8. B, C. Network cards connect to the system as either a USB or PCI device. Study "Installing a network adapter (card)".

9. A. The ATDT command is used to dial a number. Refer to "AT commands".

10. D. A bar code reader is a type of device that reads bar codes and converts the code into data to be used on the computer. Examine "Other Input Devices".