A+ Chapter 3 - Peripherals and Expansion

15. Which of the following is not an example of a standard peripheral input-device connector? A. 1⁄8g jack B. Mini-DIN C. D-subminiature D. USB

A 15. A. Multimedia input devices, not standard input devices, use 1/8g jacks. Standard input devices include human interface devices, such as keyboards and mice. The other three options can be used for such devices.

18. What type of adapter has an RJ-11 jack built in? A. Modem B. Video C. Sound D. NIC

A 18. A. Modems have RJ-11 jacks for interface to the Public Switched Telephone Network (PSTN). The modular jacks that Ethernet NICs have are known as RJ-45 jacks.

8. Which of the following display interfaces is equivalent to DisplayPort with PCIe added in? A. Thunderbolt B. WHUXGA C. IEEE 1394c D. HDMI

A 8. A. Intel and Apple collaborated on Thunderbolt to add PCIe to VESA's DisplayPort and to make the resulting interface smaller and less expensive to connect.

11. What kind of device uses unique physical traits of the user to authenticate their access to a secure system or location? A. Barcode reader B. Biometric device C. Keyboard D. Touch screen

B 11. B. Biometric input devices scan a physical trait of the user, such as voice, fingerprint, and retina, for authentication purposes when the user attempts to access computer systems and other property.

14. What can you use to convert video to a format that can be uploaded to the Internet, among other things? A. A barcode reader B. A video capture card C. A TV tuner card D. A MIDI device

B 14. B. A video capture card is used to convert raw video input to a format that can be shared electronically. Although many TV tuner cards provide this functionality, it is their videocapture component that gives them this capability. Any adapter that is strictly a TV tuner cannot capture video

17. What category of adapter would you need to install to equip a system with one or more USB ports? A. Multimedia B. I/O C. Communications D. Video

B 17. B. Interfaces, such as USB ports, are considered input/output ports. If you have to add USB capability to a computer, an I/O adapter with USB ports on it would meet the need.

20. VGA-based video technologies use what type of signal between the adapter and monitor? A. Digital B. Analog C. Compressed D. Composite

B 20. B. VGA signals are analog, uncompressed, component signals that carry all the video information for all three components of the original RGB signal.

5. What peripheral port type is expandable using a hub, operates at 1.5MBps, and is used to connect various devices (from printers to cameras) to PCs? A. DVD 1.0 B. USB 1.1 C. IEEE 1394 D. IEEE 1284

B 5. B. USB hubs are used to connect multiple peripherals to one computer through a single port. They support data transfer rates as high as 12Mbps, or 1.5MBps (for USB 1.1, which is the option listed here).

10. How do you connect a DVI-A interface on a peripheral to a DVI-D interface on the computer? A. With a DVI-I cable B. With a cable that is terminated on one end with a DVI-A connector and on the other end with a DVI-D connector C. You wouldn't interconnect those two interfaces D. With a standard DVI cable

C 10. C. Such a connection should not be made. DVI-I cables act like universal cables; they can connect two DVI-A interfaces or two DVI-D interfaces with adapters. Natively, they are used to connect two DVI-I interfaces, both of which are configured as either analog or digital. They are unable to convert the analog signal to a digital one, however. Analog and digital DVI interfaces are too disparate to interconnect.

13. Which type of input device employs roughly the same connector as the original AT keyboard? A. Barcode reader B. PS/2 keyboard C. MIDI D. Touch screen

C 13. C. MIDI devices use a 5-pin DIN connector similar to the one used with the original AT keyboard.

16. Which category of adapters includes NICs? A. Multimedia B. I/O C. Communications D. Video

C 16. C. Network interface cards are considered to be a form of communications adapter.

19. What type of pointing device features a ball and buttons on the top and a flat, steady surface on the bottom? A. Mouse B. Touchpad C. Trackball D. Trackpad

C 19. C. A trackball is a sort of stationary mouse that has the ball for movement detection on the top of the device along with the keys. The ball is actuated by the thumb or fingers, not by moving the device along a flat surface or mouse pad. Trackballs are ideal where desk space is limited. There is no such thing as a trackpad.

4. What peripheral port type was originally developed by Apple and is currently regarded as the optimal interface for digital video transfers? A. DVD B. USB 2.0 C. IEEE 1394 D. IEEE 1284

C 4. C. The IEEE 1394 standard provides for greater data transfer speeds, increased power, and the ability to send memory addresses as well as data through a serial port. USB 3.0 proves to threaten more competition in these areas, but USB 2.0 could not compare to the overall performance of IEEE 1394.

7. The surround sound mode known as 5.1 employs how many speakers when only one is used for each channel? A. 1 B. 5 C. 6 D. 7 E. 8

C 7. C. The description 5.1 refers to six channels of audio. The 5 in the name refers collectively to the single center channel, the right and left front channels, and the right and left rear channels. The 1 in the name refers to the single LFE channel connected to the subwoofer.

9. Which of the following interfaces allows audio to be sent out over the same cabling infrastructure as video? A. VGA B. DVI C. HDMI D. Composite

C 9. C. HDMI is a digital interface and cabling specification that allows digital audio to be carried over the same cable as video.

3. Which of the following standards are specified by IEEE 1284? (Choose two.) A. SPP B. RS-232 C. EPP D. ECP E. FireWire F. USB

C, D 3. C, D. Bidirectional parallel ports can both transmit and receive data. EPP and ECP are IEEE 1284 standards that were designed to transfer data at higher speeds in both directions so that devices could return status information to the system. The standard parallel port only transmits data out of the computer. It cannot receive data. FireWire is specified by IEEE 1394. IEEE 1284 does not specify serial protocols, such as RS-232 and USB.

1. You want to plug a keyboard into the back of a computer. You know that you need to plug the keyboard cable into a PS/2 port. Which style of port is the PS/2? A. RJ-11 B. DE9 C. DIN 5 D. Mini-DIN 6

D 1. D. A PS/2 port is also known as a mini-DIN 6 connector.

12. Why might you use a KVM switch? A. You have multiple Ethernet devices that need to communicate with one another. B. You need to be able to switch the voltage supplied to a particular device. C. You have a printer that is not attached to the network but you want multiple computers to be able to print to it. D. You have more than one server and don't want to buy certain external peripherals separately for each.

D 12. D. KVM switches are ideal when you have multiple computers situated near one another and do not want to commit the extra desk space to each computer having its own keyboard, mouse, and monitor.

2. What is the maximum speed of USB 2.0 in Mbps? A. 1.5 B. 12 C. 60 D. 480

D 2. D. The USB 2.0 spec provides for a maximum speed of 480 megabits per second (Mbps— not megabytes per second, or MBps).

6. Which peripheral port type was designed to transfer data at higher speeds over a D-sub interface? A. DVD B. USB C. IEEE 1394 D. IEEE 1284

D 6. D. The IEEE 1284 standard specifies that the ECP parallel port use a DMA channel and the buffer be able to transfer data at higher speeds to printers.